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 IPhone4 / IOS Tablet 1/2/AIR/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: Lithium battery 1200mAh (built-in)Charging Interface: MicroFitment: for IOS Tablet/ iphone 4.0 OS / PS3 / Smart Phone / PC / HTPCButton Layout: 49 keysPackage 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 Google/Android/OSfor Windows Mobile (6.0 and higher) operating systemfor Nokia Sysbian S60 (V3.0 and higher) operating systemfor IOS