System support: 1. Support Smart Mobile System (for Nokia Symbian S60 System; For Android System; for Windows Mobile 6.0 System;) 2. Support for PC and HDPC; 3. Support for Sony Player 4. Use with non-BT equipped PC or Laptop need a USB Bluetooth adapter; Features: 1.wireless Bluetooth 3.0 interface 2. Features comfortable, ergonomic design with 49 keys 3. The intelligence power source management system helps to save battery power for when you really need it, longer battery life than similar products by 50% 4.As with particular power management software, it indicates the power capacity in Microsoft Windows System automatically 5.Built-in software solutions with Bluetooth human interface device and comply with the standard version of the Bluetooth SIG bluetooth 3.0 6.Built in rechargeable Li-ion batter battery, support USB charge; Technical specifications: 1. Frequency band: 2.4 - 2.4835GHz ISM BAND without license 2. Receiving Sensitivity: -75bm (standard) 3. RF output power: up to 4bm as maximum, good for your health with the lowest radiates 4.Operation distance: 0-10m 5.Operating temperature: -10 ~ 55 6. Workable environment: 0-55 7. Humidity: 20% -50% 8.Size: 100x60x6mm / 3.94x2.36x0.24inch Package includes: 1 X Bluetooth keyboard 1 x USB cable