Datamax O'Neil Compact4 Mark II. Print technology: Direct thermal, Type: Mobile printer, Print speed: 125 mm/sec. Maximum roll diameter: 15 cm, Supported paper width: 40 - 115 mm, Maximum printing width: 10.4 cm. Connectivity technology: Wired. Wi-Fi standards: 802.11b, 802.11g, Security algorithms: WPA2. Built-in barcodes: 1D, 2D, Data Matrix, EAN13, MaxiCode, PDF417, QR Code, Internal memory: 8 MB, Flash memory: 4 MB