MOdel Number : Bluetooth Receiver Transmitter Package : Yes Features: Portable This Extremely Portable, Lightweight Wireless Audio Transmitter &Amp; Receiver Is An Ideal Wireless Audio Solution For A Wide Range Of Situations And Uses. Transmitter Mode Wireless Streams Audio From Your Non-Bluetooth Tv, Home Stereo System To Your Bluetooth Headphones Or Speakers. Receiver Mode Wireless Streams Audio From Your Bluetooth-Enabled Phone, Tablet, Or Computer To Your Wired Stereo, Speakers, Or Headphones. Mode SWitching If The Device Has Been In A Mode For A Long Time, It Needs To Be Re-Energized Twice To Switch To Another Mode. If The Device Has Just Switched Mode, You Want To Immediately Switch To Another Mode, You Only Need To Re-Energize Once. Widely Application This Product Is Compatible With Most Bluetooth Protocol Products On The Market, With Low Output Delay And Stable Performance. Widely Used In Computer / Laptop / Tablet / Home Stereo System / Headset / Smart Phone / Mp3 Player And So On. Specifications: Type: Bluetooth Receiver Transmitter Material: Plastic Color: Black Quantity: 1Pc Bluetooth: 5.0 Version Size: 3.2*1.7*1.0Cm/1.25*0.66*0.39In Weight: 12G/0.42Oz Package: 1* Bluetooth Receiver Transmitter 1* 3.5Mm Audio Cable 1* User Manual