Karnotech&reg; Bluetooth 3.0 Audio Music Streaming Receiver Adapter with Hands Free Calling and 3.5 Mm Stereo Output 3.5mm stereo audio output, LED indicator, one touch connect button. Automatically connect, if you need the cell phone connect the receiver automatically, just turn on the Bluetooth of the cell phone first, and then turn on the Bluetooth receiver, The Bluetooth receiver can be automatically paired. If you need white color,please search ASIN:B00O8G68JO to find it. Support headphones like: iPhone, Android phones, other smart phones which with Bluetooth A2DP functions This adapter can be connected to any stereo sound input wireless bluetooth music receiver. You can now do not need to connect the cable and trivial from your mobile phone, laptop or iPod receive to music. This adapter can be connected to the family A/V system, home electronics, headset, automobile and motorcycle speaker and boats, RVs and so on. press on car stereo music receiver the switch on the button do not left still you find red and green light, Make electricity, it will automatically search a matching launch device.