The Eartec UL321 UltraLITE 3 - Person System comes with 2 single and 1 double headset. UltraLITE Double headsets let users stay in full - duplex voice contact all the time, even when moving. Unlike most wireless headsets, they work without belt - pack transceivers. All electronics, including the battery, are inside the ear cups. The UltraLITE Double features deluxe padding and a fully adjustable noise - cancelling microphone, ensuring clear voice communication in noisy places. Key features include an all - in - one design that gets rid of wires and belt - worn radios, a 270 - degree swiveling mic boom for left or right ear use, DECT technology, 6 - hour continuous operation with lithium polymer batteries, and no need for FCC licensing. Technical specs: DECT 6.0 standard, 1920 - 1930MHz frequency in the USA (1880 - 1900MHz in Europe), 4 oz weight, and more.

Using the Eartec UL321 UltraLITE headsets is easy. First, charge the headset for 3 hours using the provided charger. You can wear it on either your left or right ear, just adjust the mic boom to your preferred position. Once charged, turn it on and you're ready to communicate. In high - noise areas, make sure the noise - cancelling microphone is adjusted properly. When not in use, store the headset in a cool place between - 10°C and 60°C. Don't expose it to extreme temperatures or moisture. To keep it in good condition, clean the ear cups regularly with a soft, dry cloth. And remember, the battery provides about 6 hours of operation, so charge it again when needed.