Latest Bluetooth Technology Equipped with the latest Bluetooth 5.0 technology, have a faster connection and 33 feet long rang transmitting Quickly Connected Our receiver is connected quickly, after the first connection is successful, the second connection will automatically reconnect Long Battery Life Our Bluetooth music adapter have a large battery life. Single charge with 8H for RX mode or 3.5H for TX mode Strong Compatible This Bluetooth 5.0 Tech converter have wide compatible could be connected cell phone, IPhone, Ipod, Samsung, Huawei and other smart phones and backward compatible for Bluetooth 4.2/4.0/3.0/2.0 devices Size：59.5*22*12MM Warning）Important: 1.Tx9 transmitter does not work on Fiber port smart TV 2.If it is used on TV, before buying, please confirm whether there is audio output interface on TV such as RCA or 3.5MM interface.