Two earplugs; earphone is designed with two earplugs which provide more private communication; and comes with two pair of extra earplugs of different sizes Effective noise reduction; walkie talkie headset transmits sound through the vibration of the throat; can effectively reduce the interference of background noise and wind noise Adjustable throat mic; the size of the neck part can be adjusted; the user can automatically adjust it according to the size of the throat; adjust the throat microphone close to the throat to obtain clear transmission when using Refuse muffled sounds; different from normal acoustic tube earpieces; will not reduce the sound during transmission; don’t need to raise the sound excessively to make the other party hear clearly K head 2 pin; compatible with most 2 pin walkie-talkies; compatible with Retevis RT22 RT21 H-777 RT68 RT22S H-777S RB26 RT19 RT-5R two way radios and more; can't compatible with DEWALT walkie talkie Retevis ETK007 adjustable throat mic walkie talkie earpiece is transmitted through the vibration of the throat. Can effectively reduce background noise and wind noise. Suitable for cycling and outdoor activities.Speaker Dimensions:Φ13.5mmSpeaker Impedance:16 Ohm±15%Speaker Sensitivity:98±4 dB/1mW 1KHzDistortion Rate:5% Max Rated input Power:50mwMax. Input Power:100mwThroat Sensitivity:-60±4dB/U=2V; R=2.2KΩ. 1KHz Plug wire:PU wire Ear wire:PU wire; Compatible with the following walkie talkie models Retevis：H-777/RT21/RT19/RT18/RT27V/RT21V/RB38V/RT7/RT22S/RT15/RB17V/RB27V/RT5R/RT5RV/RT5/RT85/RT76/RB26/RB17A/RB27/RT80/RT84/RT53/RT10/RT43/RT72/RT26/RT1/RT51/RT86/RB25/RT81/RT50/RT56/RA16/RB37/RT22/RT68/RB35/RT67/RT17/RB17/RT66/RB27B/RB28/RT27/RT28/RT69/RT46/RB18/RT3SKenwood KPG:KPG27D, KPG29D,KPG48D, KPG49, KPG55D, KPG56D, KPG62D, KPG66D, KPG69D, KPG70D,KPG74D, KPG75D, KPG77D, KPG82D, KPG87DKenwood TH: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, TH31BT, 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-415Kenwood TK:TK-208/308,TK-220/320,TK-240/340,TK-240D/340D,TK-248/348,TK-250/350/353,TK-260/360,TK-260G/360G,TK-270/370,TK-270G/370G,TK-272G/372G/373G,TK-278G/378G/388GPro-Talk,TK-430/431,TK-2100/3100Pro-Talk,TK-2102/3102/Pro-Power,TK-2107/3107Pro-Talk,TK2207,TK3207,TK-2160/3160HYT:TC286 386 2685 3865 6685, TC 278 378 388, TC 2100 2088Package includes:1 x ETK007 Throat Mic Walkie Talkie Earpiece Two pairs of earplugs with different sizes
