Klein Electronics TITAN-FLEX Titan-FlexBoom Headset; Extreme High-Noise, Dual-Muff Headset with FlexBoom Microphone, Foam Pads and Black Earshells; Universal 5-pin Cable ConnectorKey FeaturesExtreme noise reducing-Racing, Manufacturing, Oil Rig, Construction, Engineering, OSHA ComplianceOEM branding availableUniversal 5-pin cable connector plus scanner/compatible with ipod portSealed push-to-talkIncludes 3.5mm Audio Input port/Great for scannersAlso available with Gel PadsdB reduction rated earshellsUse with K-Cord SpecificationsMICROPHONEDynamc Frequency: 200Hz - 4000HzDynamic Impedance: 150x(1) Ohms (1000Hz)Dynamic Sensitivity: >0.5m V/Pa (200Hz - 4000Hz)Dynamic SNR: >12dBElectret Frequency: 200Hz - 4000HzElectret Impedance: 680 OhmsElectret Sensitivity: (-51dB) +/- 3dBElectret SNR: >55dBSensitivity Reduction: <3dBVoltage Range: 1-10vCurrency Consumption: <0.5mASPEAKERSSize: 40mm dynamicImpedance: 32 OhmsRated power: 60mW - 100mWFrequency Scope: 300Hz - 4000kHzDistortion: <5% @ 300-4000HzResonance frequency: 800Hz - Free airFOAM EAR SEALSDiameter inside: 2-1/4" x 1-1/2"Diameter outside: 4" x 3"Thinckness: 3/4"Headstrap attach method: Flexible rubber damEARSHELLSMaterial: ABSNoise tested: 25dB NRR, 32dB SNR