GRD2是小型、超声波收发通讯设备，可用于2个以上潜水员或水面站之间的通讯。BuddyPhoneD2由数字信号处理，声音清晰。ØNominalRange:50to500metersdependingonseaconditi***&noiselevels.ØTran***issionType:Ultrasoundusinguppersinglesideband(USB)ØTran***itOutputPower:1/2WattPEPØStandardFrequency:Freq.A(Channel1):32.768kHzUSB,Freq.B(Channel4):31.250kHzLSBØAudioBandwidth:300to3,000HzØAutomaticGainControl:Greaterthan80dBØEarphone:CeramicØMicrophone:ME-16RHot-Mic(Dynamic)orSuperMic(Standard)(Ceramic)ØTransducer:CeramiccylinderØBatteryType:Alkaline9VorUltralifelithium9Vor9VLi-polymerrechargeable.BatteriesnotincludedØMaximumOperatingDepth:130feetinseawater(fsw))