Feature: Type:earplugs，headphones，headset Headphone type:In Ear Headphones Use:Mobile Phone With Microphone Diameter plug:3.5mm Pronunciation Uni:8mm comply with Dynamic Structure Cavity Material:zinc alloy，copper Impedance:18ohms Sensitivity:108db Frequency range:5-28Khz Quality performance standards:CNAS L1454 Cable length:1.2m± 5cm Supply of raw materials Address:Japan， Germany， China Origin:Made in China Weight:50g Package include:1 * Music Call Headset - With Mic 1 * Retail box1 * Storage bag2 * pairs of earplugs Introduction: ED8 very sound thanks to dual 360 Degree surround magnetic coil，the overall driving performance than the traditional structure of the headphones exceed four times.Bottom sound performance is very dense texture evident.Vocal knot like in particular is completely beyond the framework of traditional in-ear headphone，almost equal professional headset. Cavity by zinc alloy forged one temperature， electro-acoustic simulation curve design bevel return after the chamber can be more precise control of airflow volume pronunciation unit volume，thereby allowing full voice firmer.Custom and standard spiral silicone sleeve， you can almost perfect fit everyone's ear canal， creating a negative pressure lower than C sets feel more comfortable.