【Instant Purchase Available】 【Also listed on other flea market apps, so priority will be given to the first buyer】 ● Product Overview I purchased this several years ago and used it for about a month to listen to TV audio with wireless earphones. I've kept it in storage since then, so it's relatively clean, and I've confirmed it powers on. However, if you're concerned, please refrain from purchasing. The box, manual, all cables, and protective bag are included. ※ There is some tearing on the inner box, please check the images. ● Product Details Bluetooth Transmitter & Receiver Product Model Number: BT-B20 ※ Please refer to the images of the manual for detailed specifications. Various manufacturers release this product with their own brand names, so you can search the model number to find their websites. Features ● Bluetooth 5.0 & Optical Digital Support ● Two-in-One Functionality Transmission Mode (TX): Enables wireless audio streaming from non-Bluetooth TVs and video devices to Bluetooth speakers and headphones. Reception Mode (RX): Enables wireless audio streaming to your existing portable speakers and audio devices from Bluetooth-enabled smartphones and tablets. ● Low Latency & High Quality Supports high-quality audio codecs aptX and apt-X Low Latency, minimizing Bluetooth communication delays and lip-sync issues compared to SBC and AAC, reducing stress.