Comstar Duplex Wireless System from Eartec Comstar is a breakthrough full duplex wireless designed specifically for production teams that need to communicate while working with their hands. These revolutionary intercoms are not voice activated and there is no delay when transmitting. The system allows up to eight users to talk simultaneously and communicate just like on a regular wired system. Item Includes: 1 Dual Channel XT Series Com-Center 1 Com-Center Battery, AC wall plug & AA disposable battery sled 4 Comstar Single Headsets 4 Comstar Double Headsets Comstar Headset Batteries 1 Multiport Charger 2 Padded Carrying Cases