Portable plug - in subwoofer sound

Interface type: Card reader
Battery capacity: 800
Frequency response range: 100HZ-20khz
SNR: ≥75dB
Power supply: Built-in lithium battery
Track: 2.1
Running Time: 2 hours
Extended storage: 32GB
Bluetooth protocol: 4.1
Number of speakers: 1
Effective distance: 10 m
Functions: Card insertion, radio
Operation mode: press the button
Applicable people: General
Shell material: metal
Supported format: Usb flash drive
Speaker adjustment mode: button