Printing technology Direct Thermal
Print resolution 203 dpi
Print speed (Depends on the media used.) Maximum 127 mm/sec
(Under Brother standard environment)
Maximum print width 72 mm
Maximum print length 1 m
Minimum print length Label: 6 mm*
Receipt: 6 mm
* With black mark only


Weight Printer with battery:
Approximately 610 g
Dimensions Approximately 113 mm (W) x 80 mm(H) x 186 mm (D)


USB USB Ver. 2.0 (Full Speed) (mini-B, Peripheral)
USB host -
Bluetooth Ver. 2.1 +EDR (Class 1)
Wireless LAN IEEE 802.11b/g/n (Infrastructure Mode)
IEEE 802.11g/n (Wireless Direct)
IEEE 802.11b (Ad-hoc Mode) *1


Operating temperature Operate: -10 °C to 50 °C
Charge: 0 °C to 40 °C
Operating humidity 10% to 90% (No condensation, maximum wet bulb temperature: 27 °C)
Storage temperature -20 °C to 60 °C
Storage humidity 10% to 90% (No condensation, maximum wet bulb temperature: 45 °C)

Power supply (optional)

Battery Rechargeable Li-ion battery: 7.2 V
Battery yield 5,300 labels (when connected by USB, and using a new, fully charged battery.)
Tested using Brother’s print test data (8.5% coverage 76.2x33 mm) at 23 °C.
Charging time 3 hours (when charging at 23 °C with the printer turned off, and using a new battery)
Adapter AC adapter (15 V)
Car adapter Cigarette car adapter or Wired type (12 V (DC))

Media specification

Media type Receipt
Media width 25 mm to 80 mm
Gap between labels 3 mm or more
Thickness Receipt: 0.058 mm to 0.090 mm
Tag: 0.090 mm to 0.135 mm
Label: 0.080 mm to 0.170 mm*
* For RJ-3050: With black mark only
Diameter (max) 66 mm
Core diameter (min) Receipt: 12.7 mm
Media sensor Reflective/Bar
*1 For Apple devices
The following devices may not support Ad-hoc mode:
- (iOS 14 or later) iPhone 12 series, iPhone 11 series, and iPhone SE 2nd generation
- (iPadOS 14 or later) iPad Pro 5th generation and iPad Air 4th generation
- iPad and iPad mini released after 2021

To connect your printer to these devices, we recommend using Wireless Direct.

For computers
Not all computers and operating systems, may support Ad-hoc mode.