Descriptions:
<br /> 2-In-1 Bridges Your Bluetooth Device To Your Speakers Or Your Bluetooth Speakers To Your Audio Device.
<br /> Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode. 
<br /> TX Mode:Plug In To Your Non-Bluetooth Device And Pair Up Your Bluetooth Speaker Or Headset.
<br /> RX Mode: Plug Into Your Non-Bluetooth Speaker And Pair Up Your Bluetooth Phone Or MP3 Player.
<br /> Bluetooth-enable all 3.5mm media devices (enable Bluetooth receiving: speakers, headphones and more; enable Bluetooth transmission for: MP3, CD / DVD players, e-readers, TVs and more).
<br /> Built in battery for portable use, or fast-charging it through the USB cable, BUT, it can not be used while charging!
<br /> Ideal For Any Powered Speakers Or Devices Using Standard RCA Or 3.5mm Jack Or AD2P Bluetooth.
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<br />1  Take the output of your CD/DVD players, MP3/MP4 players, PDAs, or iPod and convert it to streaming stereo audio via Bluetooth transmission - all in one compact unit.
<br /> 2)worked as a bluetooth transmitter to make your audio device have bluetooth function
<br /> 3) worked as a bluetooth receiver, add bluetooth receiving funciton to your headphones, home stereo, Hi-Fi system
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<br />4 Transmitter & Receiver All in One Just change the mode to enjoy your simply life.
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<br />Specifications:
<br />Bluetooth: V3.0 Class  Supports Bluetooth A2DP and AVRCP profile with 3.5mm stereo plug.
<br />Transmission Distance: 10m / 33ft
<br />Working Time:  TX: up to 8 Hours
<br />              RX: up to 6 Hours
<br />Working frequency range: 2.402Ghz-2.480Ghz
<br />Battery: 160mAH Lithium battery
<br />Charging Time: 2 Hours
<br />Switchable Mode: RX/TX
<br />Charging Requirement:5V DC,100~240V AC adapter
<br />Working Temperature:
<br />Color: Black
<br />Material: ABS
<br />Dimension: 6.6* 2.5 * 0.9cm 
<br />Net Weight: 15g
<br />Audio Port: 3.5mm
<br />Package includes:
<br />1 * 2 in 1 Bluetooth audio Transmitter & Receiver
<br />1 * 3.5mm Stereo Audio Cable
<br />1 * Charge Cable
<br />1* User's guide.