YT-- For CE-NET: Support Bluetooth connection/A2DP Music play/AVRCP Remote control/Phone hands free/AUX IN/USB Recharge Installation guidance: 1, Plugs in to the back of the Car Stereo. It uses CD changer port of your stereo. 2, Plug-and-play operation. 3, Works as an AUX Input converter for any MP3 player. To remove your existing car radio, You may be to find more information via websites or by contacting a dealer/qualified installer. car BluetoothAdapter (YT-): Absolutely Bluetooth integration kit for car stereo 1. Hands free phone call (HFP) in car 2. A2DP music streaming into car stereo 3. Audio Remote Control (AVRCP) via car stereo buttons and steering wheel control. Track up/down, Play/Pause 4. Charge smart phone via USB port. 5. 3.5MM jack auxiliary input to play mobile phone etc. 6. Automaticaly play A2DP when switched from FM mode to CD mode 7. to adjust HFP volume and A2DP volume separately via remote buttons. 8. Plug and play via CD changer port,no damage to car interior, no need to cut wire. 9. CD quality sound 10. With Led indicator for different working status Voltage Input : 11V~14.6V DC Operational Current : 600mA Standby Current : 20mA Operating Temperature: -35℃~+75℃ Resolution : 20bit Total Harmonic Distortion : 0.05% SN Ratio : 90dB Frequency Response : 20HZ-20KHZ Module case is made of plastic and aluminum alloy Color: Black Material: plastic Package Contents: 1 * MP3 digital disc box 1 * butterfly box main harness 1 * AUX cable 1 * English instruction manual 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.