voice amplifier price in Bangladesh

01922333043 , cell number
Specification:
Output RMS 10W
wireless distance 50 Meter
Sound covers over 500 square meter
usage time 10~15hours
2600mAh rechargeable batter
4hour charging speed
microphone sensitive: -53dbv/pa
frequency response: 120Hz~17kHz
Input microphone = -20db 600 ohm
Speaker impedance 4 ohm
Support MP3 files
MicroSD Card up to 32GB
USB pendrive, USB disk support
Color: Black
Size: 108*88*37mm

Package include:
1x S611 Mini Amplifier
1x Wall Charger
1x USB charging cable (miniUSB type)
1x UHF wireless Microphone
1x Wire headset microphone
1x Wristband

Warranty:
1 year