Compatible for Android/iOS/Windows OS devices. Please download relative APP / driver on your device, and connect it with the printer via BT 4.0 & 3.0, USB cable or serial port line. Speed 90mm/sec, 203dpi resolution, high speed, clear printing, low noise. Print 58mm wide thermal paper, max. printing width 40mm, with 100km reliability printing life. With auto sleep, auto awake, power saving to prolong service time, standby time up to 2-3 days. With lighting indicator showing working condition, easy to operate. Mini size & lightweight, easy to maintain, portable to carry. Ideal for receipt, bill, ticket printing.Battery 7.4VDC/1500mA