Interface:     USB + Serial, or Ethernet, 802.11b/g/n (2.4GHz) and 802.11a/n (5GHz) or Bluetooth 2.1 + EDR
Paper Dimensions:     80mm: 3.13" ± 0.02" x 3.27" diameter (79.5 ± 0.5(W) x 83.0mm)
58mm: 2.26” ± 0.02” x 3.27” diameter (57.5 ± 0.5(W) x 83mm)
Reliability: MTBF 360,000 hours
MCBF 60,000,000 lines
Overall Dimensions(W x D x H): 140 x 199 x 146 mm 
Case Color:     Epson Dark Gray (EDG)
mPOS-friendly printer compatible
DHCP enabled model available for easy IP/network configuration
Printer class model available for easy connection and discovery
Supports 802.11a/b/g/n with 2.4GHz/5GHz compatibility and Bluetooth 2.1 + EDR
Ideal for customers with low volume of POS transactions
All-in-one-box accessories and software
Print speed up to 200mm/sec
Paper-saving options up to 30%
Flexible coupon printing on receipts
Epson’s cost-effective mPOS-friendly TM-T20II, designed for smaller retailers, is fast, reliable and supports all the leading mobile operating systems including iOS, Android and Windows. It features printing up to 200mm/second, high reliability, multiple ease-of-use features, dual interfaces and print options that reduce paper usage up to 30%