Features: Designed for non-Bluetooth audio systems. It is the perfect solution for your various non-Bluetooth home audio systems or car speakers to achieve the ideal wireless audio. Easy to use, convenient and compact design makes your audio system smooth. A connection range of up to 15m allows you to get rid of messy cables and experience wireless music. Plug and Play, Wide Compatibility: no battery, no drive, plug and play. Very suitable for home or car non-Bluetooth audio system and wired headset/TV/PC etc. 2-in-1 design is not only a Bluetooth receiver or a Bluetooth transmitter, one device has two modes, you can easily switch in the transmitter/receive mode to solve your various usage needs. With the version of V5.0EDR and high-definition audio technology, our Bluetooth receiver transmitter can be connected to the device more stably, and can transmit quickly and reduce noise as well as low latency to ensure excellent stereo effects. Specifications: Material: plastic Colour: black Size: 45x20x11mm Package Contents: 1pc/2pcs/4pcs/6pcs/8pcs Bluetooth Transmitters 1pc/2pcs/4pcs/6pcs/8pcs 3.5mm Aux Jack Stereo Cables