Feature: 1. Multifunctional: This inkless mobile printer is multifunctional and can be used to print receipts, contracts, photos, pictures, journals, DIY, greeting cards, study notes, lists, labels, long banners, play coloring, card recognition, learn to learn or other games, and more. 2. Built In 2000mAh Rechargeable Battery: This thermal printer has a built in 2000 mAh rechargeable battery, which is fully charged in about 1.5 hours, continuously prints 90 sheets of A4 thermal paper, and automatically shuts off when not in use for 30min, and the standby time can be up to 30 days. 3. Good Compatibility: This portable inkless printer is compatible with for iOS and for Android phones (via Bluetooth), connect Bluetooth, download the for iprint APP, print anywhere, anytime, with a resolution of 200dpi. 4. Multiple Paper Sizes Supported: This bluetooth thermal printer supports 2.24 inch (57 mm), 3.15 inch (80 mm), 4.41 inch (112 mm), A4 and 8.5 inch x 11 inch letter paper. 5. Wide Application: This wireless thermal printer adopts advanced thermal technology, compact and portable, with a wide range of applications, perfect for offices, schools, business trips and home use. Specification: Item Type: Thermal Printer Material: ABS Connection: Bluetooth 4.0 or Above Supported System: For iprint APP supports for Android, for iOS (Not Compatible With Computer) Printing Resolution: 200dpi Battery Capacity: 1 x 2000mAh Rechargeable Lithium Battery (Included) Auto Power Off: 30min Charging Time: Approx. 1.5H Charging Port: Type C Continuous Printing Duration: 90 Sheets of A4 Thermal Paper Printing Speed: 10mm/s. Package List: 1 x Thermal Printer 1 x USB Cable 1 x Manual 1 Roll x Thermal Paper (Built In) Note: 1. Hello, if the device Bluetooth is not found, you can follow the steps below to search again: (1) Restart the printer to ensure it is not connected to other devices. (2) Make sure the phone Bluetooth is turned on. (3) Please turn on GPS (location information) in the phone settings and enable location permissions in the app permissions. Please click on the device in the app's My Devices list to connect. Thank you! 2. This printer is only suitable for thermal paper and cannot be used for normal paper printing. 3. FAQs: Q: I can't find the connected device when adding it to the application? A: Please check if the device is turned on to ensure the Bluetooth is working properly. Q: What should I do if my device cannot print? A: 1. Make sure the phone Bluetooth is on and check for other connections to this device. 2. Check if the thermal paper is stuck. 3. If the print head is overheated, wait for it to cool down before trying to print again. Q: Why is the printout blank with no content? A: This may be due to improper installation of the printing paper. Please refer to the 'Replacing Printing Paper' instructions for reinstallation. Q: Why do the printed letters fade? A: 1. Check if the device is on low power. 2. Check for stains on the print head, gently wipe with an alcohol swab.