Excelvan BT03 Portable Car Bluetooth Audio Music Streaming Receiver Adapter with Hands Free Calling and 3.5 Mm Stereo Output for Smartphone, iPhone, ipad, Samsung,Motorola,HTC,Sony,SE- Black AUTOMATICALLY CONNECT FUCTION : 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. FEATURE-RICH, EASY TO USE : Car Transmitter, Music or call switching, free and relaxed. Super clear and flow conversation effect. Support mobile, laptop, iphone, ipad, MID and so on that with Bluetooth function ABUNDANT INTERNAL AND EXTERNAL CONFIGURATION PARAMETERS : 3.5mm stereo audio output