For Carman 997.1 PCM2.1 Bluetooth module Retain the PCM2.1 feature without Android hosts Suitable for host blueprint 3 cdr24 is also fine, Add the Bluetooth module function and you don't need to change the host The optical fiber module takes the CD channel of the front trunk It does not affect the use of single-disk CDs on the main unit Fix the old host problem. PCM 2 CD , PCM 2.1DVD, CDR23, CDR24 For 911 (996 MK2/997) 2003 - 2011 For 2003 - 2010 For 2003 - 2010 For 2003 - 2010 Colour:Black Material:ABS Package Contents: 1x Car Audio Input Decoder Box 1x power cable 1x Audio Line 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.