Features:

Easy to use by connecting audio input line to change the common sound-box to Bluetooth sound-box 
Support digital products using Bluetooth,such as iPad, iPhone, Bluetooth cell phone, Bluetooth PC 
Complies with Bluetooth 2.0, Support A2DP V 1.2 
Transmission distance: not less than 10 meters 
Optional powered directly with power adapter or powered by PC USB port 
Optional embedded batterie which has long working life 
Convert your wired earbuds or headphones to wireless via Bluetooth 
Charge the rechargeable batterie via any USB port pour maximum listening 
3.5mm line-in jack allows you to play other external audio sources, such as MP3, MP4 etc. 
Adds the ability to listen wirelessly through your existing 3.5mm wired headphones

Voltage: 5V DC 
Line Out: 3.5mm 
Support file: A2DP 
Connector:Standard Mini USB 
Transmission distance: Up to 33 feet (10meters) 

Methods used:
Step 1: Bluetooth music receiver connects diretly to speaker with 3.5mm dudio cable. 
Step 2: Enable the bluetooth function pour the devices such as iPod, iPhone, bluetooth PC, cellphone, search bluetooth devices to find the bluetooth music receiver and connect it. 
Step 3: After successful paring, music can be played by player without wires.   

Specifications:

Color: Black/White
Item size: 60*36*15mm
Net weight: 74g
　

Packet content:

100% Brand New

1 x Bluetooth Music Receiver

1 x Mini USB Power Cable

1 x Manual