EN 352. Active ear defenders with an integrated radio. Approved for the most popular safety helmets. Dust and splash protected complying with IP56. Transmits on the licence-free frequency range PMR 446, 16 channels. 38 possible sub-channels for private conversations within the group. The external microphone amplifies the volume of quiet surrounding sounds. VOX sound activation. Simple controls with ergonomically shaped buttons and menu in English. Display on the right capsule shows menu selection. Boom microphone with noise reduction. Automatically switches off after 10 minutes' inactivity. Robust helmet fixtures with a steel spring mechanism. No exposed metal parts. Simple, telescopic size adjustment. Light, replaceable ear pads with a click-in system. Running time 12 hours. Standby time 20 hours. Charging time up to 5 hours. SNR value 30 dB. Weight 547 g. Delivery includes rechargeable AA batteries and a USB charging cable.