The Endura ESK-1WATD-IC7 1-Wire Surveillance Earpiece features kevlar reinforced cable and a quick disconnect acoustic tube. Equipped with an in-line Push-To-Talk (PTT), sturdy metal clothing clip, spare earbud, and a 1 year manufacturer warranty. Compatible with Icom IC-F1000 (D/T/S), IC-F2000 (D/T/S), IC-F3001, IC-F3002, IC-F3003, IC-F3011, IC-F3013, IC-F3021 (T/S), IC-F3022 (T/S), IC-F3023 (T/S), IC-3026 (T/S), IC-F3031S, IC-F3032S, IC-F3033S, IC-F3036S, IC-F3101D, IC-F3102D, IC-F3103D, IC-F3210D, IC-F3230 (DT/DS), IC-F4001, IC-F4002, IC-F4003, IC-F4011, IC-F4013, IC-F4021 (T/S), IC-F4022 (T/S), IC-F4023 (T/S), IC-F4026 (T/S), IC-F4032S, IC-F4033S, IC-F4036S, IC-F4101D, IC-F4102D, IC-F4103D, IC-F4031S, IC-F4210D, and IC-F4230 (DT/DS) two way radios.