The EartecUL541541 UltraLITE is a 5Person Full Duplex Wireless Intercom system, operating on a DECT 1.9 GHZ band, that delivers team coordination in a selfcontained headset for hands free communication. It is the perfect match for use in mobile video production, field production, live sports, theater sets sounds stages. The Eartec UL541 system has an impressive range of up to a 1,4Mile in open space making it a great fit for boaters, hunters as well as ATV, UTV and ORV enthusiasts. The UltraLITE headset provides breakthrough technology with all electronics, including the battery,circuit board,antennas being built right inside the earcup of the headset. This amazing feature eliminates the need for wires,beltpacks that can be exposed to outside elements.The lightweight 4 oz yet solid construction of the Eartec UltraLITE headset allows for 6 hours of comfortable use powered by a Lithiumion battery. Theres no need to worry about getting cut off during that critical take or cue Headsets feature auto mute boom technology and can be worn as a right or left ear with 270 degree swivel capability. Since UltraLITE headsets are field programmable all base packages are expandable, 1 MAIN accepting 4 REMOTES, and can even be incorporated into a HUB or Interface system to accommodate your growing needs. A complete system includes 1 single MAIN headset,3 single REMOTE headsets,1 double REMOTE headset,batteries,charger and carrying case. Features. Excellent performance. Range up to mile. DECT Frequency. Digital 1900 MHz band is interference free. LiPoly Batteries. Provide continuous 6 hr operation and are field replaceable. Adjustable Mic Boom. Rotates 270 degrees, worn on left or right ear. Auto Mute. Mute microphone simply by moving the boom to up position. Volume Control. Simple up , down push button adjustment. Water resistant. Silicone sealed for use outdoors in inclement condition. Deluxe padding. Headsets fit firmly yet comfortably for an 8 hour work shift. Field Programmabl