3M Peltor WS LiteCom PRO III Headset, , NRR 28 dB, hard hat attached, CSA Class AL

Attenuation Rating 28 dB,  Attenuation Rating (HML) M

Audio Type Communication, Battery Life 11 Hours

Battery Type  Rechargeable Li-ion Pack, Bluetooth

Built in 2-Way Radio, Communication Direction Two-Way

Communication via External 2-Way Radio  Yes

Connection Type Wireless,  Connector Size (Imperial) 0.062 in

Connector Size (Metric) 1.6 mm

CSA Class CSA Class AL