Function: bluetooth microphone Length: 20CM Colour:black Material:plastic Fitment: For : 301 307 408 3008 508 308S For : C2 C3 C4 C5 C6 For : DS5 Host model : For RD45 CD Host Package Contents: 1X Microphone 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.