TX Mode: Connect a Bluetooth transmitter to audio output devices such as a TV, iPod or PC, you can enjoy ultra-fast, high-quality audio from your Bluetooth headsets, headphones or speaker.
RX mode: Make your old Bluetooth home stereo turn on and rejuvenate again.
Bypass mode (wired): you no longer need to connect / disconnect any wires, it is easy to switch them to the other two modes.
Bluetooth headphone extension: Expand the Bluetooth range by connecting to weaker wireless audio devices or connect to another Bluetooth adapter to increase the Bluetooth one.
Dual stream: The function of the dual link BT-B21 Bluetooth adapter also provides simultaneous data transfer in 2 headphones or speakers.
Large Battery Capacity: The product has a built-in 1000 MAH lithium polymer battery and fully charged for 15 hours in TX mode and 20 hours in RX mode, the charging time is about 4.5 hours. When the battery is below 20%, there will be a low battery reminder. After 6 minutes without connection, the product will automatically enter the sleep mode, and comes with a battery protection IC, you can use it while charging, which is safe and reliable.
Several Cables provide Flexible Connection Our product is equipped with a product specification manual, digital fiber optic cable, USB cable,3.5mm AUX&RCA audio cable, no additional cable required, you get maximum flexibility.
LED Status Indicators LED indicators are used to identify working modes, different codecs S( aptx low latency, aptX, SBC),3.5mm audio/fiber connections, to identify if the pairing is successful and easy to set up.
What is in the box?
1*3-in-1 Bluetooth 5.0 Transmitter Receiver
1*Optical digital cable
1*3.5mm Audio cable
1*RCA Audio Cable
1*USB Charging Cable