Feature:1. Light in weight and compact in size, portable and easy to carry, will not occupy a large space.2. Built‑in intelligent power management software to save power, longer running time.3. Built‑in rechargeable lithium ion battery, which can be recharged repeatedly, which is more environmentally friendly.4. The perfect companion for smartphones, making typing, chatting and gaming easier than ever.5. Fit for Android devices, meet your different demands.Specification:Item Type: Mini Bluetooth KeyboardMaterial: ABSWeight: Approx. 87g/3.1ozColor: BlackBluetooth Version: V3.0Bluetooth Frequency: 2.4GHzSignal Transmission distance: 10m/32.8ftWorking Voltage: 3.7VWorking Current: <1mACharging Time: about 3 hoursBattery Specification: Li battery 1200mAh (built-in)Charging Interface: Type CFitment: for PS3 / Smart Phone / PC / HTPCButton Layout: 49 keys.Package List:1 x Bluetooth Keyboard1 x USB Cable1 x InstructionNote:The device must have built‑in BluetoothThe mobile operating system should be one of the following:for Android/OSfor Win Mobile (6.0 and higher) operating systemfor Sysbian S60 (V3.0 and higher) operating system