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FeaturesIP56 Heavy duty water proof speaker microphone for two way radio.Easy smooth feel PTT and clear voice quality.With durable 360 degree metal back clip.Vigorous, rugged and adaptable designed for tough working environments.Long PTT life can withstand more than 50,000 times.Use shatter-resistant speaker housing.Feature a 3.5mm jack accessories for connecting an earphone to the unit.SpeakerDimension (mm): ¢36Sensitivity : 1143dBImpedance: 8ΩRated output power: 0.5WPeak power output: 1WMicrophoneDimension (mm): ¢6*5Sensitivity: -383dBFrequency: 1kHzImpedance: 2.0V/2.2KΩOperation voltage: 1-10VWireDimension (mm): ¢5.0mm L=3200mm(180+320+180)Durable Temperature: -40~100℃Material: PU80ACompatible:Hytera HYT PD700, PD700G, PD708, PD702G, PD780, PD780G, PD788, PD782, PD705, PD705G, PD785, PD785G, PD790Ex, PT580, PT580HHytera HYT PD702, PD752, PD752G, PD782G, PD792 Ex, PD982