Bluetooth version: 5.0 

Loudspeaker diameter :40mm 

Impedance:32R*2,0.02W*2 

Working voltage:3.3v-4.2v 

Frequency response range:20-18KHz 

Communication distance:10M 

Continuous working time: 4 H 

Charging time:2.5-3 H 

Battery: 200mah

We offer a 90 day warranty on all Tools and Accessories.
Please view our Warranty Policy for complete details.