Case size (H× W× D): 51.1 × 44.5 × 17.4 mm Weight: 59 g Case / bezel material: Resin - The resin housing is the ideal everyday companion. It is durable, lightweight and relatively insensitive to cold, heat or other external influences. Band: Resin Water resistance: 200-meter water resistance (Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810) Mineral glass Power supply and battery life: Charging system compatible with dedicated cable (requires device with Type-A USB terminal) Solar power Run time: Using activity functions (heart rate): Approx. 35 hours max. / Using in watch mode with heart rate measurement OFF: Approx. 1 month Smartphone Link feature: Mobile link (Automatic connection, wireless linking using Bluetooth®) Apps: CASIO WATCHES LED backlight (Super Illuminator) Power Saving (display goes blank to save power when the watch is left in the dark) Stopwatch function Timer Multi-function alarm Full auto-calendar (to year