How to Use: Plug and play. Specification: Item Type: Two Way Radio Earpiece Material: PU Cable Length: Approx. 100cm/39.4in Compatible Machine Type: For BaoFeng: For Series: 3R 5R 5RA 5X3 5RX3 5R V2+ 5RTP 82 82C 9R 9R PLUS For GT Series: GT 1 GT 3 GT 3TP GT 3WP GT 5TP For Series: T3 888S F8HP F9 F9 V2+ RD 5R For Wouxun: KG UV1D KG UV2D UVDIP KG 669 659 679 689 639 699 801 kg uv8e For QuanSheng: TG K4AT 2AT 22AT 45AT 42AT 25AT UV For Retevis: H 777 RT1 RT2 RT3 RT5 RT7 RT 5R RT 5RV RT B6 For Linton: LT 2288 3288 6288 5288 3188 2188 3260 2268 3268 6288 6188 3288A For PuXing: PX 666 777 777 PLUS 3288 888 For Hytera: TC 268 268S 270 270S 278 286 368 368S 370 370S 378 386 388 2088 2100 2685 For Kenwood: For Series: 208 220 240 240D 248 250 260 260G 270 270G 308 320 340 340D 348 350 353 360G 370 370G 372G 373G 378 378G 430 431 2100 2170 2180 2102 2130 2160 2180 2360 2400 2400V 2400U4P 2400U16P 2402 2402V 3000 3100 3101 3102 3107 3118 3130 3131 3160 3173 3200L 3202L 3230DX 3360 3400 3400U4P 3402 3402U16P For TH Series: TH 21 21AT 21BT 22 22A 22AT 22E 25 26 27 28 31AT 31BT 41AT 41BT 42 42A 42AT 2E 45 46 47 48 55 75 77 205 215 225 TH F6 F6A D7 D7A D7AG D7E D72A D74A F7 F7E G71 G71A G71E K2 K2A K2E K2ET K20A For NX Series: NX 220 NX 320 NX 240V NX 340U NX 420 Package List: 2 x Two Way Radio Earpiece or 10 x Two Way Radio Earpiece Note: Please allow for some errors in manual measurements.