Dimensions: 13.5x6.95x3.5cm Screen specifications: 2.8-inch 320*240 pixel IPS screen Bluetooth receiving distance: about 10 meters Number of output audio channels: 2 channels Working current: 30-180mA (only the mainboard working current, the power consumption is different in different states, and the peripheral current is not included) Colour:Black Material:aluminum alloy note:Accessories colors are random, no specified colors are accepted Package Contents: 1 set * 2.8-inch color screen Bluetooth audio player decoder board 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.