Designed to facilitate wireless coordination and communication, the UL2S UltraLITE from Eartec is a 2-person single-eared headset system suitable for use on film sets,marine operations, theater sets, and more. Each headset weighs only 115 grm, transmit and receive over a digital frequency with total clarity  and can last six hours before requiring a recharge, which you can accomplish via the included charging station. Its microphone can swivel 270°. When you're done, simply pack it all up in the case. These headsets will receive audio at ranges of over 500M.