B-Link is a 2-in-1 wireless audio transmitter and receiver featuring the latest Bluetooth V4.1 and aptX Low-Latency Technology. With B-Link, you can convert your non-Bluetooth audio devices into Bluetooth. DUAL MODE B-Link can be easily switched between TX (Transmitter) and RX (Receiver) Mode. When it works as a Bluetooth transmitter (TX), you can stream the HD audio from the TV to TWO Bluetooth headphones or speakers wirelessly. (Note: aptX Low Latency does NOT support dual pair mode.) Under the Bluetooth Receiver Mode (RX), you can connect with two mobile phones, and turn non-Bluetooth devices such as car speakers, home hi-fi systems, and so on, into Bluetooth. BLUETOOTH V4.1 PLUS APTX LOW LATENCY TECHNOLOGY Say goodbye to the lip-sync delay! The latest aptX low latency technology reduces the end-to-end lag time to 40 milliseconds. Now you can watch TV/Movies and listen to high-fidelity sound in perfect synchronization. CONNECT TO DUAL HEADPHONES OR SPEAKERS Made for TVs and other audio devices! B-Link wireless audio transmitter enables TVs and other devices to stream high definition sound to p to two Bluetooth headphones or speakers, wirelessly. Experience full freedom of movement, listen without bothering those around you, and block out distractions with B-Link and your favorite pair of Bluetooth Headphones. Other Specifications Bluetooth V4.1 Class II Bluetooth Transmitter and Bluetooth Receiver in ONE With aptX Low Latency Technology to deliver the HD audio in perfect synchronization. Transmitter Working Time: Up to 13 hours Receiver Working Time: Up to 12 hours Dimension: 43.8 x 43.8 x 12.4mm Weight: 18g