Citizen CMP-20BTU Model CMP-20 Portable Receipt Printer with Bluetooth, 3 LED to indicate battery status, Up to 80 mm (3.1") per second printing speed, 2" Printer Class Size 3 LED to indicate battery status, Integral tear bar to cut paper to length High speed and low noise emission of the line thermal printing Easy paper-handling, owing to the paper-drop-in-style Windows drivers and software development toolkits for a range of application platforms AC adapter as standard designed to recharge batteries on-board the printer or via an external charging station