[2-IN-1 Bluetooth Transmitter & Teceiver] Easy to switch between transmitter (TX) and receiver (RX) modes; In TX mode, the aux Bluetooth transmitter connects non-Bluetooth audio sources such as airplanes, PC, TV, or MP3 players to Bluetooth earbuds, earphones, headphones via 3.5 mm (AUX) cable; In RX mode, plug the Bluetooth receiver into wired earbuds/headphone/earphone and receive audio from cell phone/tablet/computer via a 3.5mm AUX cable. | [Stable Connection] The 2 in 1 wireless Bluetooth adapter is equipped with Bluetooth V5.3 chip to achieve stable connections, wide signal range, and fast transmission; It could be connected with Bluetooth headphones that support A2DP/AVRCP/HFP protocol to form wireless audio transmission network when watching movies or TV programs; Additionally, the Bluetooth 5.3 adapter has a 10m/33ft reach so you can relax with plenty of space to enjoy your content. | [Dual Pairing To Share Fun] In TX mode, the Bluetooth 5.3 transmitter receiver can simultaneously connect two Bluetooth headphones/earbuds/earphones; It could fulfill your thoughts of listening to music or watching movies together with your partner without bothering others. | [Support Hands-Free Calls] The wireless Bluetooth adapter provides upgraded car audio to Bluetooth audio hands-free calls when driving, that when under RX mode, you may press the button 1 to answer and hang up the phone, or long press the button 1 to reject the phone call. | [Large Capacity] With the Bluetooth 5.3 technology, it would reduce power consumption and offer fast and stable transmission; The playtime of the 2 in 1 wireless 3.5mm Bluetooth adapter would be up to 13 hours when one pairing two, or up to 14.5 hours when one pairing one after fully charged. When under low battery situation, the button 2 light of the wireless 3.5mm bluetooth transmitter would keep flashing red light, and when charging, button 2 would keep stable red light; After the Aux Bluetooth adapter has been fully charged, the button 2 red light would be off. | [Wide Compatibility] The Bluetooth audio transmitter and receiver works with 3.5mm audio devices including in-flight entertainment systems, computers, treadmills and other gym equipment, gaming devices, TVs, and portable DVD players, allowing item such as wired speakers/soundbars, rental cars, and boat sound systems to wirelessly receive audio from gaming devices, phones or tablets.