The CoachComm 2400 4-channel wireless BeltStation operates in conjunction with the Tempest2400BaseStations. Each Talk button has individual LED indicators. The Talk button can be latching or momentary. The Call button sends a 2-wire compatible call signal to  any wireless BeltStation and any hardwired intercom device on the intercom channel. BeltStations are provided with a rechargeable  Lithium-Polymer battery capable of  nine hours of operation or can be powered by three Standard AA Alkaline batteries. Each BeltStation has its own back-lit display and menu functions, which allow settings to be changed locally at the BeltStation.Audio
Each full-duplex BeltStation establishes a unique audio path (point-to-point) with the associated  BaseStation delivering an individualized mix minus signal to other BeltStations in the system. Therefore, each BeltStation can monitor a unique mix of intercom channels and other audio sources.Durability
The TMP-R424 BeltStations are made of a weather-resistant ABS co-polymer blend with a high performance polyurethane over-mold.Tempest2400 Seamless Roaming 
Tempest2400 Seamless Roaming is the ability for one or more Tempest2400 BeltStations to move freely from one BaseStation to another without any intervention from the end user. This allows the implementation of a Tempest2400 wireless intercom system which can cover large areas with multiple zones or areas in a facility that would not be adequately supported by a single antenna installation. A BeltStation can roam between as many as 16 different BaseStations (coverage areas or zones). In addition, all Tempest operational modes (Normal, Shared and Split) are supported for seamless roaming.CoachComm TMP-R424 Features:4-channel, full-duplex BeltStation2.4GHz, license free operationDual Talk/Listen operationBacklit LCD screen shows battery life, RF signalstrength, and moreStage Announce Output with relay closure5 individually assignable relay closures atBaseStationLithium-Polymer Rechargeable battery  (or 3Alkaline AA batteries)Weather-resistant enclosureRoaming Features:Seamless Roaming of BeltStation between BaseStationsSupports Normal, Shared and Split modesScalable architecture allows for seamless linked roaming zonesSeamless handoffs between roaming zones are automaticRoHS compliantCoachComm TMP-R424 System Specifications:RF Frequency: 2,400 to 2,480 GHzRF Scheme: FHSS with TDMAEffective RadiatedPower: 100mW using 2dBi antennaReceiver Sensitivity: -93 dBm for 10-5 BERRadio Certification: FCC Part 15.247 and ETS 300.328rules, license freeTransmission Range:Up to 1,000ft (305m)500 - 900ft (150 - 275m) typicalAudio Dynamic Range: >94dBAudio Frequency Response: 300Hz - 3.8kHz withproprietary audio voice shapingBeltStation Specifications:Intercom Audio Channels: 4Headset Connector: 4-pin male XLRMicrophoneType: Dynamic or Electret, Auto-SelectedAntenna Internal: +2 dBi patchCharger Input: 100-240V, 0.3A, 50-60HzCharger Output: 5V, 1.25ABattery Charging: via mini USB connector using supplied chargerBattery Life, Rechargeable Lithium-Polymer: Up to 9+ hoursCharge Time, Rechargeable Lithium-Polymer:2 3/4 hours in BeltStation2 1/2 hours in charger (from empty)Optional Power: 3 Standard AA alkaline cellsBattery Life, Alkaline: Approximately 4 hoursEnvironmental: -4º – 122º F (-20º – 50º C)Dimensions (W x H x D): 4.0" x 6.1" x 1.75" (102 mm x 156 mm x 44.5 mm)Weight: 14.3 oz. (0.41 kg)