Zebra RW 420, Direct thermal, 203 x 203 DPI, 76 mm/sec, Wired & Wireless, Black, Grey Zebra RW 420. Print technology: Direct thermal, Maximum resolution: 203 x 203 DPI, Print speed: 76 mm/sec. Connectivity technology: Wired & Wireless, Bluetooth, USB port. Supported paper width: 104 mm. Product colour: Black, Grey