Features: With BT function, supports Android, IOS and Windows, convenient for you to print data from your device wirelessly. Direct thermal printer, more quiet and fast working, saves energy. Efficient and clear printing, print speed can reach to 80mm/s. Built-in 1500mAh rechargeable lithium-ion battery, can work continuously up to 8 hours Small size and lightweight, easy to carry. Designed for outdoor working, such as printing taxi bill, parking bill, express delivery invoice, restaurant ordering, ticket selling and so on.