Coodio Professional Surveillance Earpiece Headset Bodyguard FBI [Covert Acoustic Tube] Mic Microphone For 1 Pin Cobra MicroTalk 2 Way Radio Walkie Talkie Coodio's 1 pin Cobra MicroTalk two way radio professional surveillance 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). Built-in microphone 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. High quality transparent acoustic tube headset that could hardly be detected by people around you(also reduces electronic radiation), ideal for surveillance purposes and security at airports, casinos, crowd control, conventions, concerts and other working environment requiring discreet communications. 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.