The Casio GST-B400CD-1A3ER G-Shock smartwatch combines a round shaped stainless steel case and bracelet with a double push button clasp. It has a black dual display dial with LCD screens and luminescent hands which is protected beneath mineral crystal glass. Power is generated by the solar powered movement. This model also has a water resistance of up to 200 metres. Accuracy +/- 15 seconds per month Alarm function Automatic calendar Once set, the automatic calendar always displays the correct date. Battery level indicator An indicator shows the current battery level. Bluetooth® Connectivity Connect to compatible smartphones for a range of features Core guard structure Four stainless steel pipes form a metal frame that joins the bezel securely with the case back for increased shock resistance Countdown timer Date and weekday display Display illumination Auto Light: The watch dial will illuminate automatically when you tilt your wrist towards you. Once activated, this feature will automatically deactivate after six hours. LED light selectable illumination duration (1.5 seconds or 3 seconds) Hand shift function With a push of a button, hands move away to permit free visibility. Multi-language display Allows the day of the week to be displayed in a number of different languages Mute function The button tones on the mode button can be switched off for discreet operation. Pre-set alarm or timer functions remain active. Power saving After the Alert, the following operations are stopped to save power: all hand movement (excluding the day indicator), Bluetooth connection, and alarms Shock-resistant Shock-resistant construction protects against impact and vibration. Solar power A solar cell provides power for operation. Stopwatch function - Total Weight 161.0 grams - Case Depth 49.6mm - Case Width 12.9mm - Watch Movement Solar powered - Water Resistance 200 metres