BTR24 Wireless Intercom System (Telex) with 2 x TR-24 Beltpacks. Headsets not included.(uses standard 4pin xlr style connections) The BTR-24 from Telex is a wireless base station access point that can support up to 10 TR-24 beltpacks in full-duplex mode, and an unlimited number of listen-only users. This multi-channel base station uses the license-free 2.4GHz IEEE 802.11b WiFi standard. The unit has a built-in lithium ion battery that offers up to 10 hours of continuous operation. It can also run via wall power. The BTR-24 system offers three audio channels, which are selectable from each beltpack. Your privacy is ensured thanks to 64-bit audio encryption. The ClearScan feature automatically scans and selects the best RF channel for communication when the system is started. * Easy-to-use wireless base station * Can be rack mounted or stand alone * Supports up to 10 beltpacks in full-duplex mode, or an unlimited number of beltpacks in listen-only mode * Wireless range of up to 800' line-of-sight with beltpacks * No FCC license required * Operates on 2.4GHz IEEE 802.11b WiFi standard * ClearScan function automatically scans and selects a clear RF channel * Operates for up to 10 hours on internal battery. Can also run off of wall power * Three audio channels, selectable at each beltpack * 64-bit encryption