The 30 pin bluetooth receiver especially designed for product dock station,Plug this receiver into dock station,the music be transmitted to dock station from your mobile phone which have Bluetooth stereo function Receiving range: 30 feet,open and unobstructed areas up to 60 feet Great sound quality: noise eliminating technology obtain more effect than Bluetooth 3.0/2.0 technology solution Support device: Bluetooth phones, Bluetooth computers, for , for , MID and all other digital products with Bluetooth function It is fully plug & play and it doesn' need extra power,power supply by the 30pin dock speaker Specifications: 1.Bluetooth version: V4.1+,Class2 2.Bluetooth profiles: A2DP&AVRCP 3.Bluetooth frequency range: 2.4GHz-2.4835GHz How to use: 1.Plug this bluetooth receiver into the 30Pin dock speaker,it 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 "connect". 5.After successful connecting,the indicator light of receiver be blue flashing slowly. colour: black Material: ABS size: 46 x 37 x 9mm Package Contents: 2 x 30-pin Bluetooth music receiver 2 x package NOTE: Complies with analog audio speaker dock only(includes series, series, sound series, for series, times the music series, series, , 's TSX-130, etc.) Only the above package content, other products are not included. Note: Light 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.