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Hand free 1)With volume control 2)Type: in-ear 3)Resonant Freq:260Hz 4)Best service Speaker Spec. ItemSpec.Test ConditionVoice Coil IMP.32ohm±20%At 1000Hz 17.9mVResonant Freq.260Hz±20%At 17.9mVOutput S.P.L.116dB±3dBAt 1000HzInput PowerNor:6mW Max:8mW /Input VoltNor:0.5V Max:0.8V /SizeØ14.8±0.2mm /Total Height6.3±0.3mm /Microphone Spec. ItemSpec.&Test ConditionSizeØ6*5mmSensitivitity Ruffix-44±2dBV/Pa F=1kHz 0dB=I1V/Pa RL=2.2kohm D=35mmOutput ResistanceMax 2.2K Ohm F=1kHz Pin=1PaCurrent ConsumptionMax 500uASensitivity ReductionMax 3dB F=1kHzInput Volt .DC1 10V F=1kHzSignal to Noise RatioMin60dB (F:1KHX, SPL:1Pa, A weight) Wire Spec. ItemSpec.&Test ConditionBrass Wires8/0.06m Insulating WireCord Pull TestNor mal=3KGs Time=10sWire Breaking StrengthBreaking shall not less than 4KGsTotal ResistanceResistance shall not exceed 0.3ohm per meterEarphone Cord Pull Test Test PartLoadSpec.Earphone Cover &Wire10sec/3kg1. Broken rate of brass Wires is und er30% 2.Must be normalMIC Cover&Wire10sec/3kg3.PVC cover can't be damaged 4.Wire can't be pull out in coverInput Plug &Wire10sec/3kg5.Melting point can't be separatedInput Plug and veneer10sec/0.5kg1. Input Plug cutin fectible Break off.Pluck testing and Sale fog testing Pluck TestingInput PlugNaught burthen estate below 30hypo/cent, 3000cent after,Nickelplatt absenct diseinctness brtak off, Electrophoresis.Sale fog TestingTurnoff earponeMoistue95%.Sale fog5%.24hour after manutactur naughe rustiness,Oxidation.General Characteristics 9.1Operation TEMP.-20°c 60°c9.2Storage TEMP.-30°c 70°c9.3Exteral AppearanceShould not exist any obstacle to be harmful to Normal operation:not any remarkable damages,cracks,rust and distortion,etc.9.4Net WeightApprox:g9.5Humdity CharacteristicsNo any default are found after 48hours in 90 95% relative humidity at 40±3°c and 2hour drying under normal condition .9.6Vibration ResistanceNo any default are found after vibration for 1hour .In each three orientatins at sweep vibration (10 55Hz) with 2.0mm p-p amplitude.9.7Shock ResistanceNO any efault after drop down with 981m/s2(500)shock attitude upon a rubber block method shock testing machine for 1 time in each of three orientations.9.8Drop TestShall be normal after test: The direction of drop:3directions Height from 1.0meters,50time (on the concrete)9.9Daiker TestPinDart Code scale100g.Angle±60°c,25hypo/minute,10000hypohereinefor Microphone Part Conade scale100g,Angle±60°c,25hypo/minute,10000hypohereinbefor EarlapDart Conade scale100g,Angle±60°c,25hypo/minute,10000hypohereinbefor