Bluetooth 5.0 connectivity defines the C31CJ99001's wireless profile, pairing with iOS, Android and Windows devices over Bluetooth or USB Type-C to keep field and mobile workers connected wherever receipts are needed. The Epson Mobilink TM-P20II direct thermal printer delivers monochrome output at 203 dpi and up to 3.94 in/s across a 2.28-inch print width, accepting receipt rolls up to 2.01 inches in diameter. At 8 oz and measuring 4.7 in deep, 3.1 in wide and 1.8 in tall, the portable black unit ships with an OT-BY20 battery and attached belt clip; the included battery supports up to 27 hours of runtime, with a full recharge in as fast as 3 hours. An IP54-rated enclosure resists water and dust, and the drop rating reaches 2.1 meters. Five resident fonts, broad symbology coverage including QR Code, PDF417, Data Matrix, Aztec and GS1 DataBar variants, Paper Saving Mode, and an operating range of 5°F to 122°F round out the specification. RoHS compliance and a one-year limited warranty apply.