Product Description:Specifications:1. Item :Wireless Keyboard2. Color: Black.3. RF mode: 2.4Ghz.4. Operating distance: Up to 10 meters.5. Built-in battery capacity: 450mAH.6. Charging voltage: 4.2V ~ 5.05V.7. Charging current: ?¨º?350mA.8. Sleeping Current: ?¨º?1mA.9. Charging time: About 4 hours.10. Operating temperature: -10??~+55??.11. Battery type: Polymer Lithium-ion Battery.12. Standby time: 500~700 hrs.13. Transmission power: maximum +4dBM.14. Dimensions: 150x60x10mm.Features:1. Auto sleep and wake-up function of the keyboard.2. Ergonomic design、 compact and light weight.3. USB receiver、 no driver needed、 plug and play.4. wireless keyboard + Touchpad + mouse、 small and exquisite.5. Can be used for PC、 Notebook、 Smart TV、 HTPC、 Android TV BOX、 etc.System requirements:1. HID compatible device2. USB port 3. Windows 2000、 Windows XP、 Windows Vista、 Windows CE、 Windows 7、 Windows 8、 Linux(Debian-3.1、 Redhat-9.0、 Ubuntu-8.10、 Fedora-7.0 tested)、Android OS(with standard USB interface).Sleep and Wake up:1. Sleep mode is supported to save power and lengthen standby time -- if there is no operation in more than 3 minutes、 then the device will go into sleep mode、RF indicator on.2. In sleep mode、 one random click on the keys will wake up the device.NOTE:This item has not backlit LED.The manual may contains something about backlit setting、 because this Manual is a universal one for two keyboards of this model、 And one has backlit and the other haven't、 and the X1 is the one without backlit LED .Package included:1x Keyboard1x USB Charging Cable1x USB Receiver1x User Manual