The APP has large amount of templates, so you don't need to worry about design. Intelligent paper return, automatically receive the first label paper, do not waste any labels. It also supports continuous printing. 【Built-in Battery】: Built-in 1200mAh rechargeable lithium battery, 30-60mm/s print speed, continuous working time up to 4 hours. Working in low noise, it does not need ink cartridge when using, low operation cost. Support label width 20-50mm. 【Portable & Lightweight】: Made of high quality ABS ' Paint Baking, beautiful and delicate, comfortable touch. Easy to take it anywhere. You can print anytime and anywhere when they connect successfully. 【Convenient to Life】: Widely used in supermarket, clothing and jewellery store, communication industry for printing label, price, weight, date, name, etc. It's your work assistant to make your work more efficient. Specifications: Model: B21 Color: Avocado Green/Retro Red/Black(optional) Material: ABS'Paint Baking Printing Method: Thermal Printing BT Version: 4.0 Connection: BT/USB Resolution: 203dpi Label Width: 20-50mm Roll Diameter: 25mm Print Speed: 30-60mm/s Battery: Rechargeable Lithium Battery, 1200mah Paper Type: Receipt Paper/Label Paper System Supported: Compatible with Android, iOS Item Size: 130 * 95 * 60mm / 5.1 * 3.7 * 2.4in Item Weight: 310g / 10.9oz Package Size: 181 * 118 * 67mm / 7.1 * 4.6 * 2.6in Package Weight: 520g / 18.3oz Notes: PC Software Download Link: http://www.jc-ai.com/about2/show.php?id=25 Please use official designated consumable paper or label tapes. Due to manual measurement, 1-2cm deviation is normal. The printing paper are not included. Packing List: 1 * Printer 1 * Charging Cable 1 * User Manual(English)