Synco Xtalk XMax9 Wireless Intercom System with 9 Single-Ear Headsets

Wireless TechnologyDigital 2.4GHzTransmission ModeFull-DuplexOperating Range500m (LOS)Frequency Band2.4GHzApproximate RF Sensitivity<-90dBmRadio Output Frequency20dBmPowerUSB-C 5VBattery Capacity1050mAh Li-ion BatteryWorking Time24HCharging TimeAbout 2.5HFrequency Response150Hz~7KHzSignal-To-Noise Ratio≥ 65dBDistortion<1 %Microphone TypeCondenser MicrophoneMax Input Sound Pressure Level>115dBSPLOutput Sound Pressure LevelTypical 98 3dBSPL (at 94dBSPL 1KHz)Weight242g (Battery Included)Temperature Range 0~ 45° C (Working Status); -20~ 60° C (Storage Condition)