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Specification:

Charging voltage:
DC 5V/500mAh to 1000mAh

Box material:
plastic+ cloth mesh

Amplification frequency: 150-18000Hz (+-3dB)

Horn power:
3W * 1

Battery:
built-in battery (rechargeable) 300mAh

Product size:
118 * 78 * 39 millimeters

Control method:
buttons/Bluetooth