Features: 1.Stable Connection: Using BT 3.0 technology, the connection is stable, click to start the codes, easy and convenient. 2.Screen Lock Function: Operate directly on the keyboard to lock the screen of your mobile phone or tablet, which helps protect your information and saves power on the device. 3.Compatible System: Three systems are compatible with automatic connection, supports for IOS, for Android, for Windows. 4.Support Equipment: The wireless keyboard supports mobile phones, tablets, and laptops with BT function. 5.Sturdy Durable: Made of high quality materials, this wireless keyboard is sturdy, durable, not easily damaged, and has a long service life. specification:Item Type: Wireless Keyboard Material: ABS Interface Standard: BT 3.0 Charging Time: Less Than 2 Hours Operating Effective Range: Within 10 Meters Built in Lithium Battery Capacity: 150mAh (Battery Included) Sustainable Working Time: More Than 40 Hours Working Voltage: 3.0V to 4.2V Working Temperature: Minus 10 Degrees to 55 Degrees Standby Current: Less Than 0.3mA Button Life: 3 Million Clicks Standby Time: Less Than 100 Days Charging Current: Less Than 200mA PackageList:1 x Wireless Keyboard 1 xCharging Cable NoteShipped with Built in Battery