Features: Suitable for use on mobile phones, tablets, laptops, and desktops Supports Bluetoothcompatible connection and 2.4G USB receiver wireless connection With compact 78 buttons and lightweight ergonomic flat designs Can connect two Bluetoothcompatible devices and one 2.4G device simultaneously Fast and smooth switching between three devices by pressing a single button Specifications: Keyboard specifications: Bluetoothcompatible+2.4G Scope of work: 10M Rated voltage/current: 3.7V/1A Modulation method: GFSK Battery type: Polymer lithium battery Battery capacity: 300MA Button lifespan: 5 million clicks Working temperature: -10 ℃ -+55 ℃ Size:approx 30.5x14x2cm/12x5.51x0.79in Color: Gray/Black Package Includes: 1Set Wireless Keyboard note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolut