Bluetooth 5.4 2 In 1 Transmitter Receiver Aux Adapter 3.5mm Dual Connection 18 Hour Battery Mic For Calls For TV Car Airplane Headphones. Upgrade any 3.5mm device to wireless in seconds. • 2 modes: TX for sending audio to Bluetooth headphones or earbuds; RX for turning wired speakers or car stereos wireless.
eBay