TOUGH MVT. SAPPHIRE GLASS 20 Bar-200 m" W.R. Band / Matte Green Triple G Resist (SHOCK , CENTRIFUGAL FORCE , VIBRATION RESISTANT ) SOLAR POWER GPS signal reception Time Calibration Signal Reception (Auto Receive up to 6 times a Day ) The Auto Hand Home Posistion Correction Airplane Mode World Time ( 40 Time Zones, 27 Cities plus Coordinated Universal Time ) topwatch 1/20 Second. Countdown Timer Daily Alarm Low Battery Alert Power Saving (hands stop to save power when the watch is left in the dark) Full Auto Calendar (to Year 2099) Date Display Regular Timekeeping Analog: 3 Hands (Hour,minute.second) 3 Dials ( 24-hour , world time hour and minute, day) date Accuracy:+- 15 second per month (with no signal calibration) Approx. Battery Operation Time 7 Months on Rechargeable Battery (normal use w/out exposure to the light after charge 18 Months on Rechargeable Battery ( when stored in total darkness with the power save function on after full charge) Size of Case / Total Weight GPW-1000xxxx.x66.0 X 56.0 X 18.8 / 126g GPW-1000GBxx......66.0 X 56.0 X 18.8 / 126g GPW-1000V...xx.....66.0 X 56.0 X 18.8 / 126g GPW-1000FCxxxx66.0 X 56.0 X 18.8 / 151 g