【Compact Wireless Thermal Label Printer】 This B21 label printer utilizes thermal printing technology, eliminating the need for ink or toner for clean and convenient operation. Connected via Bluetooth, it's compatible with Android and iOS devices, offering fast printing. Its compact size makes it easy to carry for work or business trips, allowing you to print wherever you go. 【Richer Printing Content】 The free app provides rich content including text, numbers, symbols, images, logos, barcodes, QR codes, and more. It features numerous label designs and fonts, enabling you to print a variety of unique labels with a simple design. Through RFID, label paper can be automatically identified within the app. It also supports Excel batch printing to enhance work efficiency. 【Easy to Use】 One roll of label paper with 230 stickers is included inside the labeling machine. Simply peel off the backing, install the paper, download the app, connect to the label printer, design a label on your phone, print, peel, and stick. It can print in any language your phone supports. Each sticker measures 50x30mm, a perfect size for all mail, boxes, or bags. 【USB Rechargeable】 Equipped with a 1200mAh rechargeable battery, it operates continuously for 4 hours and automatically shuts off after 15 minutes of inactivity, offering extended standby time after charging. No need to replace batteries, making it more convenient to use. NOTE: Please fully charge the battery before the first use. 【Wide Range of Applications】 Supports label widths from 20-50mm, making it suitable for kitchen organization labels, home storage, cables, prices, barcodes, mail, or address labels. It's an excellent labeling assistant for kitchens, offices, retail stores, warehouses, etc., particularly ideal for commercial supermarket applications.