Walkie Talkie telephone 603 Main FeaturesMonitorRadioTorch lightScan functionLaunch timerSave electricity (Standby automatic save electricity)English/Chinese reporting numberCTCSS/CDCSSLow electricity warningComputer write frequencyStatic noise level setting  ApplicationPublic Service                  Ambulatory health care, Fire brigade of public securityIndustrial manufacture    Construction, Port, Industrial factoriesPersonal consumption    Group tour service, Outdoor AdventureCommercial                     Hospitality Management, Supermarket, Housing estate, Exhibition Technical SpecificationsLi-ion battery  3.7V 2300mAhWork temperature  -20~60°CAntenna impedance  50∩Subaudio frequency  CTCSS 50 groups, DCS 210 groupsChannel number 16Channel-spacing 12.5KHz/25KHzSize 185.7×52.0×42.0 mmWeight 175g  Radiating PortionFrequency Range   UHF 400~470MHzFrequency Stability (-20~60°C)   ≤±2.5PPMTransmitted Power   ≤5WStray Power   ≤60dBModulation Type FM(F3E)Maximum Frequency Deviation  ≤5KHzResidual Dispensing   ≤-40dBModulation distortion degree   ≤5%  ReceiverReceiving Sensitivity          ≤0.20uVBorder Channel choose       ≥60dBIntermediation Immunity       ≥60dBSpurious Response           ≥60dBAudio Power                     ≥600mWAudio distortion degree        ≤5%Audio output SNR                 ≥45dB