1. Adopts the reliable bluetooth 4.1 version for faster and more stable connectivity, is the best solution of wired audio equipment upgrading to wireless bluetooth-enabled devices, supports A2DP, AVRCP, HSP, and HFP, the wireless reception distance is up to 33 feet away.
2. Insert the Bluetooth Receiver into the car AUX audio port / wired speakers 3.5mm / RCA port or connected to 3.5mm wired headset, easily upgrade to a bluetooth-enabled audio device, receives audio signals from smartphones and tablets wirelessly, get rid of complex audio cable connections & tangle.
3. Supports wireless hands-free call, built-in microphone, press the "Multifunction" button you can Play / Pause Music, Call and End calls, Redial the last called number (Does Not Support Volume Control). To power on: Hold the "Multifunction" button about 3 seconds, until the blue and red indicator lights start flashing alternately.
4. Built-in rechargeable battery, provides up to 8 hours play and call time, only takes 1.5 hours to get fully charged, connect Bluetooth Receiver to PC/ USB Charger Port for charging (Micro USB Cable Included, But Charger not included).
Bluetooth Receiver 4.1 Audio Adapter Wireless Hands Free Call Car Kit
â—ŹBest solution for wired audio equipment upgrades to wireless bluetooth enabled devices.
â—ŹWireless reception distance is up to 33 feet away.
â—ŹInsert the Bluetooth Receiver into the car AUX audio port / wired speakers 3.5mm / RCA port or connected 3.5mm wired headset,
easily upgrade to a bluetooth-enabled audio device, receives audio signals from smartphones and tablets wirelessly,
Get rid of complex audio cable connections & tangle.

Specifications:
Technology: Bluetooth 4.1 + EDR, A2DP, AVRCP, HSP, and HFP
Frequency: 2.4GHz
Support 3.5mm stereo audio output / 2 RCA audio output
Support bluetooth hands-free call
Charge time: 1.5 hours; Play time: Up to 8 Hours

The way of charging:
Plug in the Micro USB Cable and connect to the 5V Cell Phone Charger / PC USB
Port for Charging (Micro USB Cable Included, But Charger not included).
Power ON / OFF
Power on: Press the “Multifunction” button about 3-5 seconds, until the blue and red indicator lights start flashing alternately.
Power off: Press the “Multifunction” button about 3-5 seconds, until the blue indicator lights goes off.

When there is an incoming call:
Press "Multifunction button" One time to answer calls, then press again to end calls.
Press "Multifunction button" Two times Continually: Redial the last called number with ease.

Play Music
Press "Multifunction button" One time to control music play and pause