NRR 22

·Suppresses harmful noise

·3 levels adjustable sound effect

·Super fast attack time less than 1ms

·EMI/RFI shielding, increased RF immunity

·Dynamic voice tracking

·QD(Quick Detachable) battery caps

· Detachable microphone

·Comfortable ear cushions

·IPX5 water resistant

·4 hours auto shut-off

· Low battery prompt.

·Runs on 2×1.5V AAA batteries