Hitage bluetooth speakers can be wirelessly connected to bluetooth devices such as smartphones, tablets and computers to playback any music collection stored on them. Product is to its powerful battery, the system delivers powerful sound, separated from any mains supply, for up to 8-10 hours and is the perfect companion for you in the park, whilst camping or on the beach. Process control can get rid of complicated connections and wiring distance constraints, users can enjoy high-quality music. Plug it in plug it into nirvana. Frequency response.