Specifications:

Signal to noise ratio: ≥ 84dB

Sensitivity: 80db+2db

Output power: 5W x 1

Magnetic speaker: 4Ω 5W 40MM

Input voltage: DC 5V 500mAh

Working voltage: 3 to 5.5V

Battery Capacity: 300mAh

Playing time: 180min

Charming time: 120min

Shell material: PC+ABS

Item size: approx.150*60*55mm

Package size: approx.150*57*57mm