Roccobarocco Smart Watch RB. SW-1201-03N Unisex Watch Strap material: silicone Strap width: 22 mm Strap Color: Black Closure: pin buckle Total length of the clock: 23 cm Case Shape: Rectangular Housing material: metal Case size: 38 x 46 x 10 mm Case color: Silver Compatible OS: Android 5.0 or above / iOS 9.0 or above Operating temperature: -10 °C to + 50 °C Bluetooth version: Bluetooth 5.0 Functions: Compatible with smartphone, message notification, call notification, stop function, alarm function, heart rate monitor, blood pressure, heart rate, calorie counter, pedometer Supplied with box and instruction manual.