Features: 1. Adopts bluetooth 3.0 module. It is suitable for iOS, for Android, and for which has optimized shortcut keys for all systems. 2. It can be used with smart phone, tablet computer, notebook computer and desktop computer. Specifications: Material: ABS + Metal Color: Black Supported Languages: Russian, English, Bilingual Operating Distance: 10 m Operating System: for Windosws, for Android, for iOS Working Voltage: 3.05.0V Working Current: <2.0 mA Standby Current: 0.30.5 mA Sleep Current: <25 UA Charging Current: 100 mA Charging Time: 4 hours Lithium Battery Capacity: 120mA Uninterrupted Working Hours: 40 hours Standby Time: 60 days Lithium Battery Life: 3 years Keyboard Life: 5 million Times Working Temperature: 1055 + C Size: Approx. 200*125*5 mm/ 7.87*4.92*0.20 inch Packing List: 1 * Keyboard Note: This product does not include wire, users can for it using USB cable.