[Portable Bluetooth Speaker + FM Radio] When you're not using it as a wireless speaker for watching TV, it can connect to any Bluetooth-enabled device. It's versatile and light, so you can take it almost anywhere and stream music or listen to podcasts from your mobile device. Also, it is a fully functioning FM radio that can be used to listen to your favorite music, news, or sports station. [No Lip-sync Delay For TV] The Avantree Audikast Plus transmitter provides <40 ms audio latency thanks to using Qualcomm aptX LL. Typical solutions in the market can have audio latency over 100MS or more which causes a Bluetooth audio lag effect where the images on the TV and the audio are off. Because of the low latency design, you experience synchronized visual & audio no matter what you're watching. [Hassle-free Pairing] The Bluetooth speaker+ FM radio and wireless transmitter are factory-paired, making the connection procedure painless during setup. Nothing to select, no settings menus to navigate. Just turn them both on, and they will automatically connect - every time. It even comes with a replaceable battery and can be used even while charging. [Clear, Vibrant Sound Quality] The speaker + FM radio features Voice Clear and Volume Boost settings. Voice Clear adjusts the volume of frequencies associated with the human voice, 2 kHz to 10 kHz, so scenes containing soft or low dialogue are easier to hear. Volume Boost improves the lowered audio signals that sometimes occur when using a TV's optical port. And, it increases the volume for anyone hard of hearing by 10 dB more than a typical competitor's device. [Compatible with 99% of the TVs] The included Optical, AUX, and RCA input cables make it work with any TV that has a functioning audio output jack. It is the perfect Bluetooth set for non-smart and smart TV brands and arguably better than the Bluetooth built into your TV. When you are watching TV and don’t want to disturb others simply use the SP860’s AUX port to plug in any wired headphones.