The Otto Professional Series 2-Wire Surveillance Earpiece Kit is 36.5 straight and features a quick disconnect low profile flexible transparent acoustic tube with easily replaceable components. It's cables are Kevlar reinforced and made with proprietary alloy for added linear and tensile strength, with up to 40lb of pull strength. The premium silent Push-To-Talk (PTT) with debris screen is optimal for discreet and reliable two way communications. Compatible with Kenwood NX200/NX300, NX210, NX410, TK190, TK280/380, TK290/390, TK480/481, TK2140/3140, TK2180/3180, TK5310, and TK5400/5210.