Build in 180mAh lithium battery,can fully charge within 2 hours and lasting for hours for no-stop high strength workingFK328 adapt folding design,can be folded into half size. Friendly to your travel and business bag, fold and goComfortable type feeling, save effort and low standard extra noiseTilt keyboard body, create a comfortable and ergonomic type gesture for you, friendly for long term edit taskSpecifications:Model: FK328Material: ABSSystem Compatible: Android, IOS, WindowsKeys Quantity: 81 KeysBluetooth Chipset: Broadcom USA BCM20730Bluetooth Version: Bluetooth 3.0Key Stroke Life: 5 MillionResponse Speed: 5 msOperation Range: 10mWorking Volt: 3. 7 VWorking Current: 2mABattery: Build In 180mAh Lithium BatteryFully Charge Time: 2 HoursWorking Time: 80 HoursStandby Time: > 2 MonthsSize: 35.8*10*1.2cmPackage included:1 x Folding Bluetooth Keyboard1 x Charging Cable1 x English and Chinese User ManualOther items not include