Casio G-Shock GG-B100Y-1ADR / Gshock GGB100Y-1A

Conquer tough terrain and grab attention with a rugged timepiece boasting a bold, eye-catching color scheme. Designed to work even in the harshest environments, MASTER of G specialty watches take timekeeping to new heights with a rugged design accented in the bright yellow used for emergency rescues. The GG-B100 MUDMASTER employs high rigidity carbon in the case to keep damage and warping at bay and ensure extreme airtightness and shock resistance. This timepiece also features a filter to protect against mud, a stainless steel panel back, and a back cover made of shock-resistant fine resin embedded with glass fibers, giving it a high level of resistance to dust and mud. The bezel also uses three layers of fine resin with carbon fiber inserts. This tough, rugged design is accented in bright bold yellow.

Specifications
Basic Information
Case size (L× W× H)
55.4 × 51.3 × 19.4 mm
Weight
92 g
Case and bezel material
Case / bezel material: Carbon / Resin　
Band
Resin Band
Construction
Shock Resistant
Mud Resistant
Carbon Core Guard structure
Water resistance
200-meter water resistance
Power supply and battery life
Approx. battery life: 2 years on CR2025
Sensor feature
Smartphone Link/App Connectivity Features
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth)
Apps
G-SHOCK Connected
Exterior
Glass
Mineral Glass
Spherical Glass
Compatible band size
145 to 215 mm
Other
Neobrite
Watch Features
World time
World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
Sunrise/sunset display
Stopwatch
Timer
Alarm/hourly time signal
5 daily alarms
Hourly time signal
Light
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Accuracy
Accuracy: ±15 seconds per month (with no mobile link function)
Other features
12/24-hour format
Hand shift feature