Description/Features: 1. Bluetooth connection distance: After testing, different mobile phone connection distance is different. Usually the Bluetooth connection distance of mobile phones is 10 meters. 2. When the volume is turned up, the sound is stuck, intermittent or stops. When the volume is turned down, the playback is normal. 3.If there is no problem with the power supply, it may be that the horn power is too small, our power amplifier output is 6W, you connected It's a 2W horn, the volume is stuck, the sound be stuck, there is a possibility that the horn burned. Specifications: Product name; Bluetooth audio amplifier board Product model: BAA2 Chip model: MIX3901 Bluetooth version: JL Bluetooth 5.0 Power supply voltage: 5V DC Power supply current: 1-3A Output channel: 2-channel stereo Output power: 6W +6W (4) Signal-to-noise ratio: 88% Due to different batches, there may be differences in product appearance and printed text, which not affect use Color:As Shown Material: PCB+Plastic+Metal Package Contents: 1*High Voltage 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.