800W power supply board test condition 12V input, ± 12V output no load is about ± 13.5V, ± 15V output no load is about 16.5V, it be reduced after charging, the general amplifier circuit power has a certain voltage adaptation range, if installed in the car, the actual working voltage of the car is about 13.5V, and the output be higher. Type: With Bluetooth Output power: 800W Input voltage: DC10-15V Output voltage: DC ± 12V Dimensions: 160mm x 35mm x 60mm/6.29 x 1.37 x 2.36in (The actual product may have slight color difference or difference, which not affect the use) Color: As Shown Material: Plastic+Metal Package Contents: 1 Amplifier 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.