ZJIANG ZJ-5802 is a 58 mm Portable Battery operated Bluetooth/USB Thermal Receipt Printer with built in rechargeable batteries and support for Windows, Android & iOS. It also comes with Free SDK support. -Bluetooth Portable Receipt Printer compatible with iOS and Android Smart Phone/Tablets/iPAD -Small in size,light weight,reliable performance,simple to connect, easy to use -Low operating costs(No Ribbons or ink cartridges) High-speed , long life-span and high quality . -Suitable for all types of commercial retail POS systems Working Duration : High capacity rechargeable lithium battery and standby time 5-6 days Fully charge ( Non stop printing 120-150m thermal roll , 20-25pcs rolls at 58 *30mm in dimension )