Features:
1. This portable, lightweight wireless audio transmitter and receiver is the great wireless audio solution for every situation and application.
2. Transmitter mode: wirelessly transfer audio from non-Bluetooth TV, stereo or CD player to Bluetooth headset or speaker.
3. Receiver mode: wirelessly transfer audio from Bluetooth-enabled mobile phones, tablets or computers to cable stereo systems, speakers or headphones.
4. Switch between transmitter and receiver modes with just a tap of the switch. Use advanced Bluetooth technology and 3.5mm audio cable (included) to easily turn off.
5. Ultra-portable audio streaming power supply. The KN319 is only 44 mm (1.73 inches) and weighs only 18 grams (0.63 ounces), but with powerful wireless audio streaming capabilities. Put this transmitter and receiver into your backpack or laptop bag without any effort It can be used anytime, anywhere.
6. Wide compatibility: With 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter can be widely used in your computer, laptop, stereo, headset, smart phone, Mp3 player, CD player, etc.
Specification:
Technology: BT4.2, A2DP, AVRCP (receiver mode only)
Operating range: up to 10 m / 33 ft (without any obstructions)
Charging time: 2 hours
Continuous use time: 6 hours (receiver mode) / 5 hours (transmitter mode)
Type of battery : 200mAh
Size: 44 × 44 × 12mm
Weight: 66 grams
Package Contents:
1 x Bluetooth 4.2 audio transmitter/receiver adapter
1 x Micro USB power cable
1 x RCA cable
1 x 3.5mm auxiliary cable
Instructions for use:
1. Turn on the power: Press and hold the power on/off button until the LED lights up and then releases
2. Shutdown: Press and hold the power on/off button until the LED goes out and then release
3. Charging: Use DC-5V charger and micro usb charging cable. The red light is on when charging. When the battery is fully charged, the red light is off.
4. Switch mode: RX: Receive mode, indicator: blue LED
TX: Transmit mode, indicator light: red LED
Correct:
RX mode: Pairing name: BT-01, find BT-01 pairing in the Bluetooth setting of the phone. The blue light flashes during pairing. After the pairing is successful, the blue light stops flashing. Connect the product to the audio device with 3.5 audio cable.
Launching mode: The launching mode will automatically search for other Bluetooth receiving devices (such as Bluetooth headset, Bluetooth speaker, Bluetooth receiver, etc.), the red light will flash when pairing, the red light will stop flashing after pairing successfully. Use 3.5 audio cable / RCA audio cable to product Connect to a TV and other devices.

Package List:
1 x Bluetooth 4.2 Audio Transmitter/Receiver Adapter
1 x Micro USB Power Cable
1 x RCA Cable
1 x 3.5mm Auxiliary Cable