Built-in 1000mAh rechargeable battery, ultra long standby time, no wires required, you can print anytime and anywhere. Wireless Connection: Support connect with APP(Iprint) by BT, compatible with Android and iOS systems. OCR fast recognition function, you can get text content by taking pictures. Multi-Function: Practical thermal printer that can help print errors, work plans, shopping lists, photos, memo, receipt, sticker, label, etc. One-click printing to improve work and study efficiency. Specifications: Color: Blue Material: ABS Connection: BT 4.0 Resolution: 203dpi Paper Width: 58mm Roll Diameter: 30mm Input Power: DC 5V Battery: Built-in 1000mAh Lithium Battery Thermal Paper Compatible: Regular/Adhesive/Label System Supported: Android, iOS Item Size: 11 * 8 * 3.5cm/ 4.3 * 3.1 * 1.4in Item Weight: 165g/ 5.8oz Package List: 15 * 10.6 * 4.2cm/ 5.9 * 4.2 * 1.7in Package Weight: 241g/ 8.5oz Note: How to Get the APP: Download the #34;Iprint #34; from the APP store(iOS)/ Google Play(Android). About BT connection: 1. Make sure that the printer is turned on before connecting BT, then open BT on your mobile phone, and connect it from #34;My Device #34; in corresponding APP.Make sure that no other device is connected to the mobile phone; 2. If the device is connected by other mobile phones, (1)You can refresh the device list after restarting the device; (2) Try to turn off BT, then restart it and refresh the APP device list; (3) Check the APP and look whether there is a need to update the system, and then connect after updating; (4) If the above-mentioned method fail, you can restart the mobile phone and printer and then connect again. Packing List: 1 * Thermal Printer 1 * USB Cable 1 * Thermal Paper 1 * User's Manual