Casio G-SHOCK G-STEEL GST-B100 Series Bluetooth Watch (GST-B100D-1AER)

Overview

The Casio G-SHOCK GST-B100D-1AER is a G-STEEL model featuring an analogue chronograph design with a stainless-steel bracelet and a dial motif inspired by heavy jet engine blades. A rotating disc at 9 o’clock supports multiple functions, including display indications for stopwatch operation and battery level. The layer guard structure and high-density mounting technology help improve wearability, while Bluetooth® connectivity enables accurate time acquisition via a smartphone. Tough Solar power supports stable operation, alongside practical features such as high-brightness LED illumination and dual-time display.

Key Features

• Shock-resistant construction with layer guard structure
• 200-metre water resistance
• Tough Solar (solar powered)
• Bluetooth® Smartphone Link with automatic time adjustment
• Dual time with home city time swapping
• Screw lock crown
• Battery level indicator and Power Saving function
• LED light (Super Illuminator) with afterglow
• Full auto-calendar (to year 2099)

Specifications

• Case size (L×W×H): 58.1 × 53.8 × 14.1 mm
• Weight: 185 g
• Colour: Steel with Black dial and Steel strap
• Casio Part Number: GST-B100D-1AER
• Case and bezel material: Resin / stainless steel
• Band: Stainless steel solid band with one-touch 3-fold clasp
• Glass: Mineral glass
• Construction: Shock resistant
• Water resistance: 200-metre water resistance
• Time adjustment: Bluetooth® (connects to a smartphone and automatically adjusts the time)
• Power supply: Tough Solar (solar powered)
• Other: Neobrite; screw lock crown

Smartphone Link & App Connectivity

• Smartphone Link feature: Mobile link (wireless linking using Bluetooth®)
• App: CASIO WATCHES
• App functions: Auto time adjustment, easy watch setting, approximately 300 world time cities, phone finder

Watch Features

• World time: Dual time (home city time swapping)
• Stopwatch: 1-second stopwatch; measuring capacity 23:59'59; measuring mode: split time
• Timer: Countdown timer; measuring unit 1 second; range 24 hours; start setting 1 minute to 24 hours (1-minute and 1-hour increments)
• Alarm/hourly time signal: Daily alarm
• Light: LED light (Super Illuminator) with afterglow
• Light colour: LED: White
• Calendar: Full auto-calendar (to year 2099)
• Energy saving: Power Saving (hands stop to save power when left in the dark)
• Battery display/alert: Battery level indicator
• Run time: Approx. 5 months on rechargeable battery (normal use without light after charge); approx. 24 months in total darkness with Power Saving on after full charge
• Accuracy: ±15 seconds per month (with no mobile link function)
• Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
• Additional display: Date display; day indicator

Authorised Casio Retailer

TacTree is an authorised Casio UK retailer. All Casio watches sold are 100% genuine, brand new and supplied directly to us from Casio UK. Each watch is delivered with official Casio packaging, instruction manual and manufacturer warranty, ensuring complete authenticity and peace of mind.

Delivery:

Free Tracked Delivery on orders over £30
Free Express Delivery on orders over £150
Collect in store - Free
Northern Ireland or Highlands & Islands available from £3.95

For full information refer to our Delivery Information page

Returns:

Please use our Returns Portal to request your return and choose your method of resolution.

For full information refer to our Return Policy