Clearer Sound Clearer and louder sound is served because of following reasons: Retevis earpiece has low impedance, 32ohm2 Pin earpieces have higher quality microphone and speaker Package includes: 4x Retevis EAK006 VOX Coiled Covert Acoustic Tube Earpiece 4x Spare Mushroom Eartip Stretchable Length PTT to pin, 92 cm; PTT to earplug, 310 mm + 8 cm coilStretchable and longer cable can offer more choice for different people in the family or team Compatible with the following walkie talkie models: Compatible with Retevis: RT22/RT21/H-777/RT68/RT19/RT27/RT28/RT22S/H-777S/RT15/RT18/RT27V/RT21V/RB38V/RT7/RB17V/RB27V/ RT5R/RT5RV/RT5/RT85/RT76/RB26/RB17A/RB27/RT84/RT53/RT10/RT43/RT72/RT26/RT1/RT86/RB25/RT81/RT50/RT56/RA16/ RB37/RB35/RT67/RT17/RB17/RB17P/RT66/RB27B/RB28/RT69/RT46/RB18/RT3S/RB28B/RB29/RT76P/RA85/RB85/RB87 Compatible with Kenwood KPG: KPG27D, KPG29D, KPG48D, KPG49, KPG55D, KPG56D, KPG62D, KPG66D, KPG69D, KPG70D, KPG74D, KPG75D, KPG77D, KPG82D, KPG87D Compatible with Kenwood 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-415 Compatible with KenwoodTK: TK208/308,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-2160/3160 Compatible with BAOFENG: Almost All: UV5R, UV5RA, UV5RB, UV5RC, UV5RD, UV5RE, UV5REPlus, uv5R+, UV5RO, A52, UV8, UV8D, UVB5, UVB6BF480/490/320/V6/V7/V8/658/520/530/999/888/777/666S/777S/888S/388A/F8+/A5 Compatible with HYT: TC286 386 2685 3865 6685, TC 278 378 388, TC 2100 2088 Compatible with WOUXUN: KG-UV1D/KG-UV2D/UVDIP/KG-669/659/679/689/639/699/801 Compatible with PUXING: PX333/888/888K/328/358/999/666/777/777PLUS Compatible with QUSHENGAN: TG-K4AT/2AT/22AT/45AT/42AT/25AT/UV Compatible with LINTON: LT-2288/3288/6288/5288/3188/2188/3260/2268/3268/6288/6188/3288A Compatible with WEIERWEI: VEV-3288S,VEV-6288,VEV-3288 Notice: Please confirm whether your walkie-talkie model is included in the above walkie-talkie models before purchasing. Package includes: 4x Retevis EAK006 VOX Coiled Covert Acoustic Tube Earpiece4x Spare Mushroom Eartip