Printing Method: Thermal Paper Width: 58mm Printing Speed Up to 90mm / sec Interface Provided USB Font Type Resolution: 8 dots / mm (203dpi) Character size: 1.5 x 3.0 mm (W x H) / 3.0x3.0mm (WxH) 9V Power Supply DC / 2A Rechargeable lithium batteries 7.4V DC / 1500mA Software Support Win 2000, Win 2003, Win XP, Win Vista, Win 7, Linux, Win 8, Win8.1 Dimension 104 x 75 x 45 mm Printer 5807/5809 Bluetooth Thermal Printer comes with a mini design, easy to carry anywhere.Suitable for printing receipt paper / payment receipts and can also be used to print directly from your smartphone. Multi Interface This printer also provides USB and COM ports so that the printer can still be connected even if it does not use Bluetooth connectivity. 58mm Paper Size Has a paper slot for a maximum size of 58mm.