Feature:1. High quality headphone, with microphone, can noise reduction, three PTT easy to use.2. PTT finger makes application more widely, switch for convenient to use.3. Dual volume knobs can meet different requirements, dual application of the microphone to make voice transmission clearer.4. Metal and ABS shell material is more durable, both ears earphone with sponge ensures more comfortable wearing.5. Comfortable soft leather ear cushion, clear and thorough speaker, waterproof connector design.6. Anti compression structure, 5 pin intake filter connecting line.Specification:Condition: 100% Brand NewItem Type: Aviation Noise Reduction HeadsetMaterial: Metal + ABSColor: As Picture ShownHeadset Parameters:Working Voltage: 1.5V-4.5VSensitivity: -56±3dBDirectional Function: Noise CancellationFrequency: 20Hz-160KHZRated Impedance: 2.2KQSpeaker Parameters:Maximum Power: 1.0WRated Power: 0.5W±3dBRated Impedance: 8QFrequency Range: 420Hz-20KHZOptions: K Head, M Head, Y HeadEarphone Plug Hole FitmentK HeadFor KPG27D,KPG29D,KPG48D,KPG49,KPG55D,KPG56D,KPG62D,KPG66D,For KPG69D,KPG70D,KPG74D,KPG75D,KPG77D,KPG82D,KPG87DFor TH-D7,TH-D7A,TH-D7AG,TH-D7E,TH-F6,TH-F6A,TH-F7,TH-F7E,TH-G71,TH-G71A,TH-G71E,TH-K2,TH-K2A,TH-K2E,TH-K2ET,TH-21,TH-21AT,TH-21BT,TH-22,Th-22A,TH-22At,TH-22E,TH-25,TH-26,TH-27,TH-28,TH31AT,TH41AT,TH41BT,TH-42,TH-42A,TH-42AT,TH-42E,TH-45,TH-46,TH-47,TH-48,TH-55,TH-75,TH-77,TH-G71,TH-205,TH-215,TH-225,TH-235,TH-235A,TH-235E,TH-315,TH-415 For TK-208/308,TK-220/320,