Coodio Over-the-Head Earpiece Headset [Swivel Boom Microphone] [Noise Cancelling] For 1 Pin Cobra MicroTalk 2 Way Radio Walkie Talkie Coodio's 1 pin Cobra MicroTalk two way radio over-the-head earpiece headset is optimized for communications intensive environments in which personnel need to interact with customers while maintaining radio communications(NOT compatible with Cobra Marine HH350 FLT, HH350W FLT, HH450 DUAL, HH450 CAMO, HH550 FLT BT radios). Swivel boom noise cancelling microphone is reversible for use with either ear, provides all-day comfort, excellent durability, reliability and performance in low-profile environment. Comes with an inline PTT(Push To Talk) button that clips on your shirt, so you can use your radio device to communicate discreetly and easily, whether you're in security, retail or hospitality. Excellent for user in police, military, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses, party, building construction, stage, studio, hunting, outdoor and noisy environments. ONLY compatible with 1-Pin Cobra MicroTalk walkie talkie two way radio including Cobra CXT135, CXT145, CXT235, CXT275, CXT345, CXT390, CXT395, CXT425, CXT545, CXT595, CXT645, CXT1095, CXT1095 FLT, CXT1095FLT, CXT1035R FLT, ACXT1035R FLT, CXT1035 FLT CAMO, ACXT1035R FLT CAMO, CXT1035 FLT, ACXT1035 FLT, CXR725, CXR825, CXR925, CX112, CX312, CWR200, CX312A-1, CTW285P DC and Cobra Marine HH125, HH125+, MRHH125 Radio.