{"product_id":"casio-ga-2100k-series-analogue-digital-watch-ga-2100k-5aer","title":"Casio G-SHOCK GA-2100K Series Analogue Digital Watch (GA-2100K-5AER)","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\n\n\u003cp\u003e\nThe Casio G-SHOCK GA-2100K-5A delivers a distinctive interpretation of the iconic octagonal G-SHOCK 2100 Series, combining contemporary design with the exceptional toughness that has defined G-SHOCK for decades. Inspired by the atmospheric lighting and vibrant energy of music festivals and nightlife, this analogue-digital watch features a smoky translucent brown case and strap, a deep piano-black dial and striking neon red accents that create a bold contrast against its understated colour palette.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBeyond its distinctive appearance, the GA-2100K-5A incorporates Casio's advanced Carbon Core Guard construction, providing dependable shock resistance in a lightweight, slim-profile design. With 200-metre water resistance, dual LED illumination, World Time functionality and a comprehensive range of timing features, it delivers the reliability and versatility expected from a professional-quality G-SHOCK. Weighing just 51 g and measuring only 11.8 mm thick, it offers exceptional comfort for everyday wear, outdoor activities and demanding environments.\n\u003c\/p\u003e\n\n\u003ch6\u003eKey Features\u003c\/h6\u003e\n\n\u003cul\u003e\n\u003cli\u003eIconic octagonal G-SHOCK 2100 Series design\u003c\/li\u003e\n\u003cli\u003eSmoky translucent brown resin bezel and strap with a distinctive matte finish\u003c\/li\u003e\n\u003cli\u003eHigh-gloss piano-black dial with contrasting neon red accents\u003c\/li\u003e\n\u003cli\u003eNightlife-inspired design influenced by laser lighting, smoke and music festivals\u003c\/li\u003e\n\u003cli\u003eNewly developed smooth dial surface for a refined, contemporary appearance\u003c\/li\u003e\n\u003cli\u003eCarbon Core Guard structure for lightweight shock resistance\u003c\/li\u003e\n\u003cli\u003e200-metre water resistance for swimming and outdoor activities\u003c\/li\u003e\n\u003cli\u003eAnalogue-digital display with separate day indicator\u003c\/li\u003e\n\u003cli\u003eDouble LED Super Illuminator for enhanced visibility in darkness\u003c\/li\u003e\n\u003cli\u003eWorld Time covering 31 time zones and 48 cities, plus UTC\u003c\/li\u003e\n\u003cli\u003e1\/100-second stopwatch with split-time measurement\u003c\/li\u003e\n\u003cli\u003e24-hour countdown timer for training and everyday timing tasks\u003c\/li\u003e\n\u003cli\u003eFive daily alarms and optional hourly time signal\u003c\/li\u003e\n\u003cli\u003eHand Shift function for improved digital display visibility\u003c\/li\u003e\n\u003cli\u003eNeobrite luminous coating for low-light time reading\u003c\/li\u003e\n\u003cli\u003eApproximately three-year battery life\u003c\/li\u003e\n\u003cli\u003eLightweight 51 g construction with a slim 11.8 mm case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e GA-2100K-5A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollection:\u003c\/strong\u003e G-SHOCK 2100 Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Analogue and digital\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Dimensions:\u003c\/strong\u003e 48.5 × 45.4 × 11.8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 51 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase \u0026amp; Bezel Material:\u003c\/strong\u003e Carbon \/ resin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Colour:\u003c\/strong\u003e Translucent brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Colour:\u003c\/strong\u003e Piano black with neon red accents\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Matte translucent brown resin band\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Wrist Size:\u003c\/strong\u003e 145–215 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass:\u003c\/strong\u003e Mineral glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Shock Resistant, Carbon Core Guard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Resistance:\u003c\/strong\u003e 200 metres (20 bar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e Two SR726W batteries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Life:\u003c\/strong\u003e Approximately 3 years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTimekeeping Accuracy:\u003c\/strong\u003e ±15 seconds per month\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIllumination:\u003c\/strong\u003e Double white LED Super Illuminator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e Neobrite, Hand Shift and full auto calendar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Manufacture:\u003c\/strong\u003e Thailand\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSmoky Translucent Design with Neon Red Accents\u003c\/h6\u003e\n\n\u003cp\u003e\nThe GA-2100K-5A stands apart from conventional G-SHOCK models through its distinctive combination of transparency, texture and colour. Drawing inspiration from the atmosphere of late-night music venues, its translucent brown resin case and strap recreate the smoky, diffused appearance of light passing through a haze-filled environment.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe matte exterior provides a subtle contrast against the deep, glossy piano-black dial. Casio's newly developed dial surface creates a smooth, refined finish that enhances the richness of the black background, while vivid neon red accents evoke the appearance of laser beams cutting through darkness.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis carefully considered combination of materials and finishes creates a watch that feels both contemporary and unmistakably G-SHOCK. The warm brown translucent construction offers a distinctive alternative to traditional solid black or brightly coloured resin watches, making the GA-2100K-5A particularly appealing to users who appreciate technical design with a strong visual identity.\n\u003c\/p\u003e\n\n\u003ch6\u003eCarbon Core Guard Protection\u003c\/h6\u003e\n\n\u003cp\u003e\nAt the heart of the GA-2100K-5A is Casio's Carbon Core Guard structure, which uses carbon fibre-reinforced resin to protect the internal watch module against shocks and impacts. This advanced construction combines strength with reduced weight, allowing the watch to maintain its slim proportions without compromising the durability expected from G-SHOCK.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe reinforced case provides dependable protection against the knocks and vibrations encountered during everyday activities, while the flexible resin strap ensures a comfortable fit throughout extended periods of wear. At just 51 g, the GA-2100K-5A offers impressive toughness without the bulk associated with larger sports watches.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIts 200-metre water resistance provides additional versatility, making the watch suitable for swimming, wet weather and demanding outdoor conditions. Combined with durable mineral glass and G-SHOCK's shock-resistant construction, it offers a practical balance of protection, comfort and reliability.\n\u003c\/p\u003e\n\n\u003ch6\u003eAnalogue-Digital Timekeeping\u003c\/h6\u003e\n\n\u003cp\u003e\nThe GA-2100K-5A combines the traditional readability of analogue hands with the functionality of a digital watch. Its two central hands provide clear hour and minute indications, while a separate day indicator and integrated digital display allow users to access additional information without compromising the clean appearance of the dial.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe Hand Shift function temporarily moves the analogue hands away from the digital display when they obstruct important information. This practical feature ensures that stopwatch readings, timer settings and other digital functions remain accessible when required.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWorld Time functionality covers 31 time zones across 48 cities, plus Coordinated Universal Time (UTC), with selectable daylight saving settings. This makes the watch useful for international travel, coordinating activities across different regions and monitoring time differences.\n\u003c\/p\u003e\n\n\u003ch6\u003eDouble LED Super Illuminator\u003c\/h6\u003e\n\n\u003cp\u003e\nThe GA-2100K-5A features Casio's Double LED Super Illuminator system, providing dedicated white LED illumination for both the analogue dial and digital display. This dual-light arrangement improves visibility in low-light environments, allowing users to check the time and operate digital functions after dark.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBoth illumination systems offer selectable 1.5-second or 3-second lighting durations with afterglow. Neobrite luminous coating provides additional support for reading the analogue hands following exposure to light.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether working in poorly illuminated environments, travelling at night or enjoying outdoor activities after sunset, the combination of LED illumination and luminous detailing helps maintain practical timekeeping visibility.\n\u003c\/p\u003e\n\n\u003ch6\u003eWatch Features \u0026amp; Functions\u003c\/h6\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorld Time:\u003c\/strong\u003e 31 time zones covering 48 cities plus Coordinated Universal Time (UTC), with daylight saving on\/off settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStopwatch:\u003c\/strong\u003e 1\/100-second measurement for the first 60 minutes, switching to one-second measurement thereafter, with a maximum measuring capacity of 23 hours, 59 minutes and 59 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStopwatch Modes:\u003c\/strong\u003e Elapsed time, split time and first\/second-place finish times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountdown Timer:\u003c\/strong\u003e Adjustable from one second to 24 hours, with one-second, one-minute and one-hour setting increments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDaily Alarms:\u003c\/strong\u003e Five independent daily alarms for reminders and scheduled activities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHourly Time Signal:\u003c\/strong\u003e Optional audible alert every hour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble LED Light:\u003c\/strong\u003e Separate white LED illumination for the analogue dial and digital display, with selectable 1.5-second or 3-second duration and afterglow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand Shift:\u003c\/strong\u003e Temporarily moves the analogue hands away from the digital display for improved visibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Auto Calendar:\u003c\/strong\u003e Automatically adjusts the date through to 2099.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTime Format:\u003c\/strong\u003e Selectable 12 or 24-hour digital display.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButton Tone:\u003c\/strong\u003e Option to enable or disable button operation sounds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalogue Display:\u003c\/strong\u003e Hour and minute hands, with the minute hand advancing every 20 seconds, plus a dedicated day indicator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Display:\u003c\/strong\u003e Hours, minutes, seconds, AM\/PM, month and date.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eLightweight Durability for Everyday Wear\u003c\/h6\u003e\n\n\u003cp\u003e\nDespite its bold appearance, the GA-2100K-5A remains a practical everyday watch. Its slim 11.8 mm case sits comfortably on the wrist, while the lightweight resin construction reduces bulk during extended wear. The flexible strap accommodates a wide range of wrist sizes and provides a secure fit during daily activities.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe combination of Carbon Core Guard protection, 200-metre water resistance and reliable battery-powered operation makes it well suited to users who want a durable watch without the need for frequent charging or complicated maintenance.\n\u003c\/p\u003e\n\n\u003cp\u003e\nPowered by two SR726W batteries, the GA-2100K-5A provides approximately three years of operation under normal conditions. Its straightforward analogue-digital interface offers quick access to essential timekeeping functions, making it a dependable choice for work, travel, training and everyday use.\n\u003c\/p\u003e\n\n\u003ch6\u003eWhy Choose the Casio G-SHOCK GA-2100K-5A?\u003c\/h6\u003e\n\n\u003cp\u003e\nThe GA-2100K-5A combines the unmistakable octagonal design of the G-SHOCK 2100 Series with a distinctive colourway inspired by the energy and atmosphere of nightlife. Its smoky translucent brown case and strap, glossy piano-black dial and vivid neon red accents create a striking aesthetic that sets it apart from conventional G-SHOCK models.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBeyond its appearance, the watch delivers the proven performance that has made the 2100 Series so popular. Carbon Core Guard construction, 200-metre water resistance, double LED illumination and comprehensive timekeeping functions provide dependable versatility, while its lightweight 51 g construction ensures comfortable everyday wear. For anyone seeking a G-SHOCK that combines distinctive design with practical durability, the GA-2100K-5A offers an excellent balance of style, comfort and reliability.\n\u003c\/p\u003e\n\n\u003ch6\u003eAuthorised Casio Retailer\u003c\/h6\u003e\n\n\u003cp\u003e\nTacTree is an authorised Casio UK retailer. All Casio watches supplied are 100% genuine, brand new and sourced through approved UK distribution channels. Orders are supplied with official Casio packaging and manufacturer documentation for complete authenticity and peace of mind.\n\u003c\/p\u003e\n","brand":"Casio","offers":[{"title":"Default Title","offer_id":57715434979703,"sku":"PE9544 BRO","price":94.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/0860\/9010\/files\/casio-ga-2100k-series-analogue-digital-watch-ga-2100k-5aer-1.webp?v=1794238249","url":"https:\/\/tactree.co.uk\/products\/casio-ga-2100k-series-analogue-digital-watch-ga-2100k-5aer","provider":"TacTree","version":"1.0","type":"link"}