You can connect the treble and woofers at the same time. Play MP3 music from TF card, U disk, Bluetooth. Small in size, easy to carry and can be installed anywhere. Remote control: full function. Use the numeric keys to control directly. Comes with a switch. Item Name: Car bluetooth-compatible Amplifier Bluetooth Version: 5.0 Voltage: AC 110-240V, DC 12-24V Rated power:30W power:120W Impedance: 4 Frequency Response Range: 30Hz-13KHz Features: Portable, Size, Remote Control Plug Type:EU Plug,it applies to Indonesia, , , , and so on Item Weight:1.9kg color:black :Plastic + Metal size:120 x 88 x 66mm Package Contents: 1 x Bluetooth Amplifier 1 x remote control 1 cable 1 x DC power cable 1 x speaker connecting cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.