The Tactical Ear Gadgets EP511 Quick Release Adapter allows the user to disconnect the microphone from the radio without removing the adapter from the radio. This reduces wear and tear on the radio accessory connector and allows the user to switch between different Tactical Ear Gadgets Quick Release accessories. Compatible Radio Models: KENWOOD TK2140, TK2180, TK3140, TK3148, TK280, TK290, TK380, TK390, TK480, TK481, TK190, TK3180, TK5210, TK5220, TK5310, TK5320, TK5400, NX200, NX300, and NEXEDGE Series.