Print Via Bluetooth-Phone: Rongta bluetooth shipping label printer supports wireless printing through bluetooth connection. For IOS and Android mobile Phone, need to download the "RT-Elabel " APP from Apple Store or Google Play. With easy and simple operations, you can easily print your logo, labels, and more, making your life more convenient! Print via USB Cable-PC: USB cable connection for Windows and Mac systems. First please kindly download computer drivers on our official website or by contacting us directly! Good Help of Money Saver: Rongta label printer utilizes advanced thermal direct technology for printing, eliminating the need for expensive toner or ink. With this printer, you can save precious time and money, making it an ideal choice for your labeling needs. Strong Platform Compatibility: This bluetooth shipping label printer can work with virtually all platforms, including Amazon, Ebay, Shopify, UPS, Esty, PayPal, Poshmark,etc.Note: The printer supports black-and-white printing only. Attention: Phone and Tablet Start Print: Download the App 'RT-Elabel', Turn on the label printer and your phone's or tablet's Bluetooth.; Laptop/PC Starts Printing: Download and install the driver from QR codes.Than Use the USB data cable to connect the desktop label printer to your computer. ✔Multi-size Support: Labels width ranges from 1.57" to 4.3", such as 4x6, 3x3, 3x2 thermal labels and so on. The clear and professional print quality, combined with high-speed and high-volume capabilities, significantly enhances work efficiency. ✔ Multi-Platform Support - Includes Windows/Mac desktop software + mobile apps (iOS/Android) with batch printing feature. ✔Ideal for: Amazon FBA & Walmart WFS sellers eBay/Shopify/Etsy store owners USPS/UPS/FedEx small business shippers