Screen size: 2.8 inches Screen pixels: 320x240 Bluetooth name: Bluetooth Audio (users can change it) Bluetooth version: V5.3+BR+ Bluetooth receiving distance: about 10 meters Audio hardware bit width: 24 bits Number of output audio channels: 2 channels Output audio signal level: Less than 2.4Vp-p Audio output signal-to-noise ratio: SNR 104db Audio output signal power: Less than 50mw (can support direct push headphones, if you need to push speakers, you need an external amplifier) Working voltage: 4.5-5.0V (needs regulated power supply) Working current: 30-150mA (only the mainboard working current, the power consumption is different in different states, does not include peripheral current) Color: As Shown Material: PCB Package Contents: 1set x decoder board module 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.