Features: All in One Printer: Support multiple functions, it can print photos, labels, messages, lists, records, files and so on. The APP offers a variety of fonts and themes to make your photos stylish. Mini & Cute Appearance: Small and lightweight body, can be put in your pocket or bag, easy to take it anywhere. 200DPI resolution, great clear printing quality. Suitable for study, office, home and travel. The best gift for students, office workers, lovers, friends, family. Convenient for Your life: Can record the scenery you see, record his or her sweet words, collect the exercises you have done wrong, fun and practical. Built-in 1000mAh rechargeable battery, working in low noise, the thermal printer does not need ink cartridge when using, low operation cost. Connection Method: Support Wireless BT 4.0 connected with smartphone. Please follow the user guide to download the relative APP (Walkprint) through the APP Store (IOS System) or Google Play (Android System). Thermal Paper Specs: Comes with 6 roll thermal paper 57x25mm, you can print as soon as you receive the package. Specification: Model: A31 Resolution: 203dpi Size: 85 x Weight: 165g Color: Blue, Pink (Optional) Printing Method: Thermal Printing Paper Roll Size: 57x25mm Battery: 1000mAh 7.4V Connection: BT 4.0 and above Charging Interface: Micro-USB Package Size: 12 x 9 x 3cm/4.7 x 3.5 x 1.1in Package Weight: 276g/9.7oz Packing List: 1 x Thermal Printer 1 x USB Cable 1 x User Manual 6 x Thermal Paper Roll