EASY DUAL CONNECTIONS: After pairing successfully to the first Bluetooth device, just short press the paring switch to turn into the second pair. The easy pairing operation makes it different from others. 
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<br />HANDS-FREE CALLING: Simply pair your phone with the Bluetooth Adapter in receiver mode and its hands-free system can set free your hands during answer the calls and let you safely drive.
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<br />2-IN-1 DESIGN: 2-in-1 Bluetooth adapter with 3.5mm jack, bridges your Bluetooth device to your non-Bluetooth speakers or your Bluetooth speakers to your non-Bluetooth audio device.
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<br />ONE SWITCH BETWEEN TX AND RX MODE: TX Mode: Plug into your Non-Bluetooth device and pair up your Bluetooth speaker or headset. RX Mode: Plug into your Non-Bluetooth speaker and pair up your Bluetooth phone or MP3 player. Up to 12 hours working time in both modes.
<br />BLUETOOTH 4.1: Get high quality audio sound than the Bluetooth 4.0 version both in playing music and answering calls. Up to 33ft connection range guarantees low signal delay.
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<br />Specification
<br />Bluetooth Version: 4.1
<br />Frequency Range: 2.4GHz
<br />Output Power Category: Class 2
<br />Bluetooth Mode: HFP/HSP/A2DP/AVRCP
<br />Bluetooth Range: Up to 33 feet
<br />Battery: 180mAh
<br />Working Current: 15mA (MAX)
<br />Charge Voltage: DC 5.0V
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<br />Packing List
<br />-1 × Bluetooth Receiver and Transmitter
<br />-1 × Charging Cable
<br />-1 × 3.5mm Audio Cable
<br />-1 × 3.5mm Audio Adapter
<br />-1 × RCA Cable
<br />-t1 × User Manual