This is KN319 Bluetooth 4.2 2 in 1 Receiver and Transmitter RCA 3.5MM AUX Jack. As a BT Audio Transmitter, it can be connected to the audio devices without BT function via the included 3.5mm Audio Plug, changing these audio devices into BT-enabled audio devices, and making it work with BT-enabled Headset and Speaker. As a BT Audio Receiver, KN319 can change the traditional Car Stereo systems and Home Audio System into BT-enabled ones, and easy to pair with BT-enabled Smart Phones, laptop, tablet, etc. With this product, you can greatly enjoy music from your phone, laptop, tablet without the hassle of cables. This 2 in 1 BT Transmitter & Receiver will give you much fun and convenience.

Features:

1. Receiver Mode: Change the traditional Car Stereo system or Home Audio System into BT-enabled ones. After paired, play music wirelessly from your BT-enabled Smart Phones, Laptop, Tablet and more.
2. Transmitter Mode: Connected to the audio devices (such as MP3, MP4, TV and PC, etc.) without BT function, changing them into BT-enabled ones, and making it work with BT-enabled Headset and Speaker.
3. Strong Compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this Receiver Transmitter adapter can be widely used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc.
4. Low Power Consumption: Built-in 200mAh rechargeable battery ensures 5-6 hours of working time, you can enjoy wireless music all day long. Easy connection, no driver needed, plug and play.
5. Convenient to Use: Switch between transmitter and receiver modes with the simple flick of a switch. Weighs only 18g (0.63oz), easy to carry in your backpack or laptop bag and take it on-the-go.

Specifications:

1. Model number: KN319
2. BT Version: 5
3. Protocol Supported: A2DP, AVRCP (receiver mode only)
4. Transmission Distance: 10m / 33ft (open space)
5. Battery: Built-in 200mAh Rechargeable Li-polymer battery
6. Continuous Use Time: 6 hours (Receiver Mode) / 5 hours (Transmitter Mode)
7. Charging Time: about 2 hours
8. Charging: Micro USB 5V
9. Color: Black
10. Main Item Size: 44 * 44 * 12mm
11. Main Item Weight: 18g
12. Package Size: 11.2 * 7.6 * 2.3cm
13. Package Weight: 77g

Package Includes:

1 x BT Audio Transmitter & Receiver
1 x 3.5mm Audio Cable
1 x RCA Cable
1 x USB Charging Cable