G Shock GW9400Y 1D Rangeman Digital Watch watch case colour@Red and an open skeleton dial and an open skeleton dial where the classy automatic movement can be examined the Guess Opaline watch combines precision with timeless beauty look no further than the G Shock GW9400Y 1D Rangeman Men’s Watch to take on your next biggest adventure battery operating time: *8 months on rechargeable battery (operation period with normal use without exposure to light after charge) *23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy: ±15 seconds per month (with no signal calibration)