360-Degree Rotating Back Clip Walkie-talkie earpiece is very convenient to use. There is a 360-degree rotating back clip on the back of the walkie-talkie headset Mic. You can fix the microphone in a convenient place. G Shape Earhook Ergonomic G shape two way radio headset designed to fit snugly of the ear. Not easy to fall off even if wearing for a long time. suitable for left and right ears. Sensitive Mic and PTT Sensitive PTT allows you easy and convenient calls; the built in mic can pick up your voice easily, you don't have to speak loudly. Great for smooth communications with your partners. Diameter Φ15mm*5.5 mm Impedance 32 Ohm±15% at 1 kHz Sound pressure level 115±3dB at 0.179V Rated power 2mW Maximum output power 3mW Types Condenser electret microphone Maximum impedance 2.2k Ohm Sensitivity 36±3dB at1Khz（0Db=1V/Pa） Operating Voltage 1.5-10VDC Plug wire Φ3.0mm PU 4-core straight line 1.0m Ear hook Φ1.95mm PU 2-core coiled wire Compatible with the following walkie-talkies: 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：TH-F6/F6A/D7/D7A/D7AG/D7E/F7/F7E/G71/G71A TH-G71E/K2/K2A/K2E/K2ET/21/21AT/21BT/22 TH-22A/22AT/22E/25/26/27/28/31AT/31BT/41AT/41BT TH-205/-215/225/235/235A/235E/315/41 TK-370/ 370G/372G/373G/320/340/340D/348/350 TK-2100/ 2160/3100/3101/3102/3107 TK-3118/3130/3160 etc Compatible with Baofeng: UV-5R Series BF-480/490/320/V6/520/530/999/888/777/666S/777S/888S Compatible with HYT: TC286 386 2685 3865 6685, TC 278 378 388, TC 2100 2088 Compatible with Linton: LT-2288/3288/6288/5288/3188/3260/2268/3268,/6288/6188/3288A KG-UVD1/UVDIP KG-669/659/679/689/639/699/801 Compatible with QUANSHENG: TG-K4AT/2AT/22AT/45AT/42AT/25AT/UV Compatible with RELM: RPU416,RPV516,RPU499,RPV599X Compatible with WEIERWEI: VEV-3288S,VEV-6288,VEV-3288 Package includes: 2 X Retevis G Shape Earhook Walkie Talkie Earpiece