• Lightweight and compact, you won't even feel like you're wearing it

• Say goodbye to the frustration and embarrassment that comes with not being able to hear properly 

• If you hearing whistling sound, please make sure whether if you put the earplug tightly or use an appropriate size earplug

• Designed with volume switch

• Comes with 2 cell batteries and 3 sizes of earmuffs

• Retractable battery compartment, convenient for changing battery

Specifications:

• Max sound output: 110 +/-5db

• Sound gain: ≥30db

• Frequency range: 300-4000Hz

• Input noise: ≤40db

• Voltage: DC 1.5V

• Current: ≤4mA