The 30 pin bluetooth receiver especially designed for Apple product dock station,Plug this receiver into dock station,the music will be transmitted to dock station from your mobile phone which have Bluetooth stereo functionReceiving range: 30 feet,open and unobstructed areas up to 60 feetGreat sound quality: Unique noise eliminating technology obtain more pure sound effect than Bluetooth 3.0/2.0 technology solutionSupport device: Bluetooth phones, Bluetooth computers, for iPhone, for iPad, MID and all other digital products with Bluetooth functionIt is fully plug & play and it doesn't need extra power,power supply by the 30pin dock speakerSpecifications:1.Bluetooth version: V4.1+EDR,Class22.Bluetooth profiles: A2DP&AVRCP3.Bluetooth frequency range: 2.4GHz-2.4835GHzHow to use:1.Plug this bluetooth receiver into the 30Pin dock speaker,it will automatically enter in pairing mode.2.At this time,you can turn on your bluetooth device to search for receiver and pair it.3.When receiver is detected,enter the PIN "0000" and confirm.4.After successful paring,select receiver from bluetooth device list and press "connect".5.After successful connecting,the indicator light of receiver will be blue flashing slowly.colour: blackMaterial: ABSsize: 46*37*9mmPackage Contents:1*30-pin Bluetooth music receiver1*packageNOTE:Complies with analog audio speaker dock only(includes BOSE series, Philip series, sound Muse series, for IHOME series, times the music series, DOSS series, JBL, Yamaha's TSX-130, etc.)Only the above package content, other products are not included.Note: Light shooting 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.