Function: insert card, call function Applicable scene: car, desktop, outdoor, home, mobile portable, K song, live broadcast, square dance, outdoor lawn Type: computer speaker Connection method: Bluetooth connection/AUX Interface type: USB Frequency response range: 40Hz-20KHz Output power: 20W Signal-to-noise ratio: ≥70db Power supply mode: built-in lithium battery Channels: 2 Playing time: 8 hours Expanded storage: 32GB Bluetooth protocol: 5.2 Number of speakers: 2 Effective distance: 10 meters Operation mode: button Playback format: MP3, WMA, WAV Whether there is a radio function: no Appearance size: 370*79*66mm