Wireless Portable Bluetooth Speaker Multi-function Radio Card Booth Audio Subwoofer

Product information: Function: insert card, radio, voice prompt, call function Type: Bluetooth speaker Connection method: Bluetooth connection Interface type: USB Frequency response range: 100HZ-20KHZ Output power: 4Ω5W*2 Signal to noise ratio: ≥75dB Power supply mode: built-in lithium battery Channel: 2 Play time: 3~4 hours Expansion storage: not supported Bluetooth protocol: 5.0 Number of speakers: 2 Effective distance: 10 meters Operation mode: button Play format: MP3, Bluetooth/TF card/AUX