1. Solve the problem of earphone background noise and buzzing sound caused by PWM frequency when adjusting the brightness of the backlight 2. Solve the problem of TFT display screen causing interference, sound, and background noise to the radio chip during communication, affecting the sensitivity of reception 3. Add infrared remote control, digital keyboard input frequency, volume, channel tuning, and SQ value setting, and other functions can be operated by remote control. Integrate the volume switch and channel tuning encoder into a large encoder to make the machine simple 4. It can also be upgraded online, download and update the firmware from the open source website 5. Adopt a fully enclosed aluminum alloy shell to achieve good sealing and not receive the resonance sound caused by turning up the volume<br><br>Add atmosphere lights for multi-sensory experience Built-in 4000 mAh capacity battery Full-range enclosed speaker Battery parameters: 3.7V/4000mAh, 18.5Wh Current consumption: about 3.7V/350mA, use time about 10 hours Communication interface: built-in CH340 USB to serial port chip, external communication through TYPE-C interface, support online upgrade (The product appearance and printed words depending on the batch, but this does not affect use) Color:As Shown Material:aluminum alloy<br><br>Package Contents: 1 * Radio 1 * Remote Control 1 * USB Cable 1 * Antenna 1 * Floor Mats<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.