lenyes outdoor ktv speaker+two microphones s823

audio parameters bluetoothversion:v5.0
battery capacity:20000ma
working hours: 5 hours
standby time: 10 minutes automatic shutdown charging time: 8±1hours charging mode: type-c5v3a
low power alarm: low power alarm when the power is 15% maximum power:160wthd+n≤59%(1khz/0db) rated power:120wthd+n≤19%(1khz/odb) frequencyresponse70hz-13khz
operating frequency:960mhz-979mzh
bluetooth connection linear distance 18meters
tws connection distance:10m