Teflon wire, rotating boom more than 20, 000 times; teflon boom swivel pad, positioning accuracy, high wear long service life; hearing protection technology, care of the user's hearing; superior sound catheter technology, high voice clarity; cardioid microphone; quick coupling head function. et; connection Types: quick connector; boom model: flexible boom, 330 degree free rotation;wearing styles: headband can be adjusted for left or right ear; comfort Degree: leather / sponge earmuffs, ear angle flexible automatic adjustment; Weight: no wiring 50g; qd first point of contact: phosphor bronze Gold-plated; cable length: 1.0 meters straightened; housing: pa66 shell Injection; cycle plug life: more than 20, 000 times; storage / use Temperature: -20 ¡æ ~ 55 ¡æ;