Specification: Speaker Size 13mm Resistance 64Ohm±15% at 1000Hz Sound Pressure Level 89dB+/-3dB at 1000Hz Rated Power 50mW Max Power 200mW Microphone size 6.0*5.0mm Sensitivity -46dB+/-3dB at 1000Hz 2-pin Icom plug · 2 pin surveillance earpiece is compatible for ICOM walkie talkie · See the details below for detailed explanation of the compatible models Durable cable · Reinforced PU cable · High Strength & Durability Rotating clip · 360 degree swivel lapel clip on the back of the earpiece · Allows you clip the earpiece everywhere you want Compatible with two way radio: Notice: Please check compatible list before you choose. IC-F3, IC-F3S, IC-F4, IC-F4S, IC-F4SR, IC-F4TR, IC-F10, IC-F11, IC-F11BR, IC-F11S, IC-F14, IC-F14S, IC-F20, IC-F21, IC-F21BR, IC-F21GM, IC-F21S, IC-F24, IC-F24S, IC-F33, IC-F33GT, IC-F33GS, IC-F43, IC-F43GT, IC-F43GS, IC-F3021, IC-F3021T, IC-F3021S, IC-F3023, IC-F3023T, IC-F3023S, IC-F3026, IC-F3026T, IC-F3026S, IC-4021, IC-F4021T, IC-F4021S, IC-F4023, IC-F4023T, IC-F4023S, IC-F4026, IC-F4026T, IC-F4026S, IC-H2, IC-H6, IC-J12, IC-M5, IC-T2A/T2H, IC-T7A/T7H, IC-T22A, IC-T81A, IC-T90A, IC-U12, IC-U16, IC-V8, IC-W32A, IC-4088A Compatible with two way radio: Notice: Please check compatible list before you choose. IC-F3, IC-F3S, IC-F4, IC-F4S, IC-F4SR, IC-F4TR, IC-F10, IC-F11, IC-F11BR, IC-F11S, IC-F14, IC-F14S, IC-F20, IC-F21, IC-F21BR, IC-F21GM, IC-F21S, IC-F24, IC-F24S, IC-F33, IC-F33GT, IC-F33GS, IC-F43, IC-F43GT, IC-F43GS, IC-F3021, IC-F3021T, IC-F3021S, IC-F3023, IC-F3023T, IC-F3023S, IC-F3026, IC-F3026T, IC-F3026S, IC-4021, IC-F4021T, IC-F4021S, IC-F4023, IC-F4023T, IC-F4023S, IC-F4026, IC-F4026T, IC-F4026S, IC-H2, IC-H6, IC-J12, IC-M5, IC-T2A/T2H, IC-T7A/T7H, IC-T22A, IC-T81A, IC-T90A, IC-U12, IC-U16, IC-V8, IC-W32A, IC-4088A