CITIZEN CMP-30 Portable Bluetooth Printer, 3"/80mm Paper, speed up to 100mm/sec 3 inch Portable Thermal Printer Paper Drop in Style USB & RS232 interface standard Factory option of Bluetooth® and Wireless LAN interfaces. Li-ion rechargeable Battery Battery monitoring Label Printing Internal Charging Circuit Belt Clip & Strap holder Firmware & Font Data loaded through interface Auto power off function Factory option: 3 track Magnetic stripe car reader