2-in-1 Bluetooth Transmitter & Receiver Transmitter mode: Easily transmit high fidelity stereo audio wirelessly from your non-Bluetooth audio sources (TV, computer, ipod, TV box, MP3/MP4, CD/DVD player, projector, airplane entertainment, Treadmill, etc.) to Bluetooth headphones/speakers. Receiver mode: Transmit audio from Bluetooth audio sources (smart phone, tablet, game machine, amplifier, etc.) to traditional car speaker/home stereo system/wired headphones/wired speakers.Premium Wireless aptX Low Latency & HD Audio3.5mm Bluetooth transmitter receiver is aptX Low Latency certified, audio latency has been reduced from 70-220ms latency to about 40ms. Delivers delay-free audio for high-definition sound in perfect audio-visual synchronization with aptX-Adaptive, aptX-HD and aptX-LL codecs. Perfect choice for you to watch TV and play video games. (NOTE: Please ensure your receiving devices must also equipped with atpX Low Latency technology.)Dual Link Music StreamingBluetooth AUX adapter can stream audio to 2 Bluetooth headphones or speakers at the same time in TX mode, or pair 2 smartphones or tablets to stream music in RX mode. Enjoy a hassle-free and noise-free streaming experience with families or friends to share precious funny time. And, when you turn on the LE507 again, it will automatically re-connect the last connected devices.Bluetooth 5.2 & Long PlaytimeWith Bluetooth 5.2 technology, wireless audio adapter would reduce power consumption and offer a faster and more stable transmission. Supports play while charging, the built-in 250mAh Li-Polymer battery could support the Bluetooth adapter to work for up to 15 hours in RX mode and 12 hours in TX mode per 2 hours full charge. Features a compact and lightweight design that takes up less space, so you can bring it anywhere.Unique Clear LED Interface & Calls Function SupportedEquipped with digital led panel, the Bluetooth adapter will show the Paring status of RX or TX mode, paring status, codec type, low battery or fully charged. It gives you very specific status information which most of other models doesn't have. Whats more, the Bluetooth AUX adapter is built in microphone for hands-free calling, one-click call button to play/ pause/ answer/ redial/ hang-up/reject calls to make your hands free in RX mode.