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-Press 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. The Bluetooth adapter has the ambient noise cancellation ENC with digital signal processing , cancellation for calls and noise cancellation technology. , portable and usable anywhere, you can experience rich and deep sound. 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 , the battery has an operating time of up to 10 hours. Bluetooth range up to 33 feet. Bluetooth version: 5.0 Frequency range: 2.4 GHz Wireless protocol: A2DP HFP AVRCP Output power: 2 levels Bluetooth Radiation Distance: 33 Feet Endurance: 10h Charging time: 2h Battery capacity: 250mAh Material:ABS colour:Black Package Contents: 1 x receiver / transmitter device 1 x USB charging cable 1 x 3.5 mm audio cable 1 x Adapter 1 x English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.