Portable outdoor subwoofer $ 16.53 Connection mode: Bluetooth connection Interface type: USB Battery capacity: 300mah Frequency response range: 100HZ-20khz Output power: 3W Signal to noise ratio:85dB Power supply: Built-in lithium battery Duration: 1-3 hours Extended storage: not supported Bluetooth protocol: 2.1 Number of speakers: 1 Effective distance: 10 m Functions: Card insertion, radio, call function Operation mode: press the button Applicable people: General
