Casio G-Shock GG-B100-1A9 Mudmaster Quad Sensors Bluetooth Mobile Link Carbon Fiber Insert Bezel gg-b100 Altimeter Countdown start time setting range:

Countdown start time setting range: 1 minute to 24 hours(1-minute increments and 1-hour increments)

Countdown timer

Back-Light function

battery life: 5 years on CR1620

Casio G-Shock GG-B100-1A9 Mudmaster Quad Sensors Bluetooth Mobile Link Carbon Fiber Insert Bezel gg-b100 Altimeter Countdown start time setting range:Case size (L W H) : 55. 4 51. 3 19. 4 mm Weight : 92 g Case and bezel material : Carbon Resin Resin Band Shock Resistant Mud Resistant Carbon Core Guard structure 200 meter water resistance Approx. battery life: 2 years on CR2025 Step count using a 3 axis acceleration sensor: 0 to 999,999 step count display range Power Saving: Auto sensor sleep state entry after fixed period of non activity Altimeter Measuring range: 700 to 10,000 m ( 2,300 to 32,800