Bluetooth 5.0 transmitter and receiver: The 2-in-1 Bluetooth adapter is available in TX and RX modes. In transmit mode, audio signals from your non-Bluetooth compatible TV or laptop can be transmitted to Bluetooth speakers or headphones. In RX mode, music can be transferred from your bluetooth device. Phone or tablet on a Bluetooth-free stereo system (no Bluetooth speakers or wired headphones). . The Bluetooth 5.0 adapter has a one-touch multifunction button for answer \/ hang up \/ reject, play \/ pause. The Bluetooth audio receiver also has a volume control button. A short press allows you to increase \/ decrease the volume and a long press allows you to switch between the tracks. . Fully Compatible: The updated version of Bluetooth V5.0 is compatible with even more devices. Bluetooth adapter wireless transmitter-receiver with 3.5 mm cable, perfect for PC, TV, laptop, home audio system, headphones, smartphone, MP3 player, wired headset, etc. . 10 hours long operating time: The Bluetooth receiver and transmitter have a built-in rechargeable 250 mAh lithium battery. And it supports use while charging. When fully charged, the battery has an operating time of up to 10 hours. Bluetooth range up to 33 feet. .