Full-band finished radio 3.2Inch large screen. Strong anti-interference! PCB double-sided full copper! The pcb case is sturdy and With voltage display (please pay attention to charging below 3.3v); the charging voltage is 5v Antenna with SMA male connector Medium wave, short wave, and FM Upgrades: 1. The system firmware flashing method is updated to any flash mode. Connect your computer and turn on radio switch to flash any suitable system firmware at . 2. Upgraded to a more powerful audio chip. The sound mode has been upgraded to a single speaker with a passive diaphragm. The dual-speaker version is a specially customized version. 3. Continue to improve compatibility of body case and motherboard. 4. Improve test method before encoder welding, and fix problem that encoder is stuck and freezes system interface. 5. Enhanced antenna eliminates root breakage. 6. Charging indicator: red light turn on when it is charging and green light turn on when it is Flash Firmware: (1. Hold boot button of motherboard. 2. Insert type-c data cable and connect to computer. 3. Turn power-on knob to power on.) Use corresponding software of host computer to flash firmware. Disconnect data cable after successful flashing. Reboot. It is finished. 5000MAH lithium battery Size:115 x 106 x 20mm/4.5 x 4.2 x 0.8Inch Weight:334g/0.7lb Color:As Shown Material:Plastic+Metal Package Contents: 1 * TEF6686 Full Band Radio 1 * Antenna 1 * English instruction manual Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.