Features 1、Stereo Music Sound: Bluetooth hands free calling, a2dp stereo, clear sound quality, stereo music sound. 2、Wide Applications: Wide range of applications, support to connect headphones, connect mobile phones, connect speakers, connect cars. 3、3.5mm Interface: The car Bluetooth receiver has a 3.5mm bi directional metal sound port with a removable bi directional connector. 4、Small Portable: Small, light weight, portable, easy to carry, can be put in the pocket, carry around in the bag. 5、Premium Materials: Made of plastic and metal, strong, durable, not easy to damage, long service life. Specification Item Type: Car Bluetooth Receiver Material: Plastic, Metal Product Color: Black Interface Type: 3.5mm Bluetooth Version: Bluetooth 4.1 Features: Support Connection of Earphones, Mobile Phones, Speakers and Cars Product Size: Approx. 5 x 2 x 1cm / 2.0 x 0.8 x 0.4in Package List 1 x Car Bluetooth Receiver 1 x 3.5mm Metal Adapter 1 x Usb Charging Cable 1 x User Manual