ITEM: Revo NC1 is a compact and economical speaker shoulder microphone with a groundbreaking noise canceling design that delivers clear voice transmission in noisy environments. It is ideal for daily use in a wide variety of environments, including noisy restaurants, casinos, retail, and hospitality. The palm-sized Revo NC1 features a large Push-To-Talk (PTT) button. The patent-pending design provides superior passive noise canceling and excellent voice clarity. It is durable as well, featuring protection against dust and blowing rain. Small in size and big in performance, Revo NC1 is the perfect speaker mic for most commercial environments WARRANTY: Includes 1 Year Warranty! COMPATIBLE RADIOS: Digital Models: NX-220 NX-320 NX-240 NX-340 NX-420 Protalk Series: TK-2400P TK-3400P TK-3230 Commercial Series: TK-2360 TK-3360 TK-2170 TK-3170 TK-2312 TK-3312 TK-2400 TK-3400 TK-3173 Older Series: TK-3207, TK-240, TK-250, TK-255, TK-260, TK-260G, TK-270, TK-270G, TK-272G, TK-278, TK-278G, TK-340, TK-349, TK-350, TK-353, TK-360, TK-360G, TK-370, TK-370G, TK-373G, TK-378, TK-378G, TK-430, TK-431, TK-715, TK-2100, TK-2102, TK-2107, TK-2118, TK-2160, TK-3100, TK-3101, TK-3102, TK-3107, TK-3118, TK-3160