Feature: 1. High Compatibility: Support for IOS and for Android mobile phone by BT connection. Turn on the printer by pressing the power switch for 2 seconds first. For mobile device, download the APP (for PeriPage) first and enter it and connect with the machine through BT function. If you need to print with the computer (for Win and for OS X), please download the driver first. 2. Multiple Printing Sizes: With 2 clips to adjust the paper slot width, thermal printer is support 216mm 210mm 107mm 77mm 56mm (8.5in A4 4in 3in 2in) width of thermal paper now, different sizes of paper to meet your printing needs on multiple occasions. And support use with roll paper and folding paper as well. 3. Clear Printing: BT printer equipped with premium print head, which has over 50km print life. Adopt advanced thermal printing technology, no ink cartridges or consumables are required, energy saving and environmental friendly. 4. Long Durability: Built in 2600mAh rechargeable batteries, which can continuous print 3 hrs after full charged, long standby time of 90 days, great for carry to business travel, school etc. You can print invoices, contracts, lists and exam documents contracts on site with your phone or computer. 5. Versatile Use: The mobile printer is ideal for printing PDF file, test paper, webpage, contract, photo, picture, etc. Long standby time and with app which has a variety of materials and typography, easy to set up and print, an excellent assistant for study and office work. Specification: Product name: A4 Portable Thermal Printer Model: P40 Product color: White Product size: 267mm (L) x 80mm(H) x 45.5mm(W) Product weight: 662g Printing method: Thermal printing Printing width: Effective printing width 208mm (8 inches) Resolution: SD (203dpi) Connection: BT wireless Printing speed: SD 10mm/s Input charging: 5V/2A (DC) Battery capacity: 2600mAh Charging time: