SINGLE-LINE PPT (PUSH TO TALK) – Single-line PTT allows effortless communication in working areas like hotel, school security, construction areas and concert. HIGH QUALITY ACOUSTIC TUBE – High quality acoustic tube offers sound without interference from surrounding noise; more accuratly conveying the human voice. SILICONE EAR TIP – The earbud fits snugly in the left or right ear with silicone ear tip keeping your conversations private. Excellent for use as bodyguard, nightclub, bars, etc. WATERPROOF & HANDS FREE – Protected against dust and water splashes from all directions. The voice-activated transmission frees your hands for other tasks. COMPATIBILITY – Compatible with all Cobra MicroTalk 2-way radios. USA ENGINEERED & SUPPORTED – With over 50 years of proven reliability, our USA-engineered communication solutions and supported products exemplify superior technology and quality craftsmanship.