Support reading MP3 songs in TF card and U disk.     Support independent adjustment of treble, bass and master volume.     Working Voltage : AC 220V or DC 12~24V     With AUX Audio input, can be connected to the computer, mobile phone or CD.     Digital power amplifier, peak power 200W.     Dual microphone input, adjustable reverb; built-in Bluetooth wireless Receiver and FM radio.     How to Connect to Bluetooth :     Turn on the subwoofer and search for the name "SZM183" by Bluetooth     Click on the device with the pairing name "SZM183", the pairing is successful automatically     The default is Bluetooth mode when power on, and it can be played directly after pairing successfully     Notice:     Some mobile phones will prompt you to enter the PIX code. You can enter "0000" at this time (if the phone supports the easy pairing function, you do not need to enter the PIN)     Plug Type: EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. / Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on.     Colour: black     Material: metal     Size: 175x80x50mm     Package Contents:     1 * Power amplifier board     1 * Plug     1 * Remote control     1 * Cable          Only the above package content, other products are not included.     Note: Light shooting 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.