Lite-Com BASIC 446 PMR on helmet

Peltor Lite-com Basic on safety helmets allows for secure and reliable wireless communication between two or more people, even in noisy environments.
The device has 8 channels (UHF license-free channels) (frequency 446MHz) and 38 sub-channels. Covers up to 2 km outdoors.
Battery life approximately 20 hours
You can see the Lite-com guide by clicking on the link below.

Noise reduction:
SNR = 33dB
H = 34dB M = 30dB L = 23dB

SNR = Mean value of hearing protection
H = Assessment of hearing protection due to loud noises
M = Evaluation of hearing protection due to intermediate frequency sounds
L = Evaluation of hearing protection due to low frequency sounds
SNR = Mean value of hearing protection