Portable and lightweight, comfortable to grip.2.4GHz wireless technology, anti-interference connection.Comes with a USB receiver, plug and play, easy to operate.Suitable for smart TV, for Android TV Box, for PC/HTPC, projectors, computers, etc..Item Name: Wireless KeyboardMaterial: ABSWireless Modulation Mode: GFSKModulated Frequency: 2.4-2.4835GHzWorking Temperature: -20 to 65 Degree CelsiusBattery Type: 3.7V/300mAh Rechargeable Battery (Included)Overall Power Consumption: Standby Power Consumption: 25uANumber of Keys: 57 KeysRemote Control Distance: >10 MetersCharging Port: Micro USBFeatures: Wireless, Remote Control, MultifunctionalSize: 15.8cm x 5.5cm x 1.65cm/6.22" x 2.17" x 0.65" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wireless Keyboard1 x USB Receiver1 x Charging Cable