Connection method: Bluetooth connection Type: Bluetooth Speaker Interface type: USB Battery capacity: 2200MA Frequency response range: 100HZ-20KHZ Output power: 5W Signal to noise ratio: ≥75dB Power supply mode: built-in lithium battery Channel : 2 Play time: 15 hours Extended storage: 16GB Bluetooth protocol: 3.0 Number of speakers: single full frequency Effective distance: 15-30M Function: dustproof, call function, voice prompt, card, mobile power Mode of operation: button Play format: WAV, MP3, WMA Shell material: metal Whether to support APP: No Supported format: TF card Speaker adjustment method: button Is there a radio function: none Cabinet material: plastic Size: 160*118*96MM Product weight: 350 (KG) Power mode: USB