Feature: Advanced thermal printing technology, no ink , convenient and cost saving. Built-in 1200mAh rechargeable batterys, working in low noise, the thermal printer does not need ink when using, low operation cost. 200dpi high resolution printing head, clear print and stable performance. Support multiple functions, it can print photos, labels, messages, lists, records, QR Code, web printing and so on. The APP offers a of fonts and themes to make your photos . Record your life, print the scenery you see, record his or her words, collect the exercises you have done wrong, and practical. Lightweight and size, easy to carry. Specification: Print Type: Thermal Printing Input: 5V,1A Resolution: 200dpi Connection: BT/USB Batterys: 3.7V, 1000mAh Colorful Paper Width: 57mm Roll Diameter: 25mm White Paper Width: 57mm Roll Diameter: 25mm : plastic colour: white+blue Package Contents: 1 x Thermal Printer 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.