Compact size and wireless design make it easy to carry Built-in rechargeable battery supports enduring working time Ideal for Android-based apps which need the function of printing Direct thermal printer uses thermal paper instead of ink and is typically smaller, quieter, faster, and more energy-efficient than dot-matrix printer Small size and light, which is easy to carry for out working, such as the taxi bill printing, administrative fees receipt printing, post receipt printing, restaurant ordering information printing, etc Black Print Speed: 90 mm/sec, Max Paper Size: 58mm