100% Original and Good Quality with Free After-sale Warranty.                       Microphone button to adjust the microphone volume     The treble button adjusts the pitch of the sound card. The accompaniment button adjusts the size of the external audio.     Record button to adjust the size of the phone's recording sound     KTV, anchor, and singing three ways to sing     The Bluetooth function will be actively turned on and connected to the music that comes with the phone, which can be inserted into the sound card.     size:120 x 105 x 25mm     Material:ABS     colour:Black     Package Contents:     1 x phone sound card     1 x USB charging cable     1 x remote control (without battery)     1 x English manual     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.