The TR-240 beltpacks have the ability to be configured in one of three operating modes: wireless, wired, or masterwireless. In wireless (normal) mode, beltpacks communicate to each other using the base station as a relay. In wiredmode, beltpacks turn off their wireless ability and communicate via Ethernet cable or through a building's existing Ethernetinfrastructure. In master wireless mode, the beltpack acts as a mobile access point to provide wireless coverage for otherbeltpacks to communicate without an actual BTR-240 base station. The TR-240 beltpack has a removable lithium ionbattery pack that provides up to eight (8) hours of uninterrupted operation. The battery pack can be charged directly in thecase by plugging a power adapter into the beltpack or by placing the battery in the CHG-240 4-bay charger. FeaturesLicense Free 2.4GHz, IEEE 802.11b WLAN technologyExpand coverage using BTR-24 access pointsMulti-level security and audio encryption2-wire and 4-wire intercom interfaceClearScan channel selectionAuto-select Electret or Dynamic microphoneChoice of two (2) independent or simultaneous audio channelsTR-240 beltpacks operate wired or wirelessEight (8) full-duplex beltpacks with virtually unlimited number of half-duplex beltpacksTR-240 beltpacks can operate as an access pointMultiple antenna options and accessoriesBattery Life 8 HoursChannels 2 CHSpecificationsFrequency Band of Operation: 2.4 GHz 802.11b WLANHeight: 5.24'' (133 mm)Length: 1.77'' (45 mm)