G Shock Solar Bluetooth GMB2100D 1A Full Metal Watch Data WatchCaseMaterial Resin offering a delicate and comfortable offering a delicate and comfortable fit on the wrist this watch will elevate your look and be a trusty daily companion The G Shock Solar Bluetooth GMB2100D 1A Full Metal Watch battery operating time: *7 months on rechargeable battery (operation period with normal use without exposure to light after charge) *18 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 mobile link function) Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents