Loud speaker; remote speaker give you clear and loud voice so you can hear your teammates clearly Kevlar reinforced spring cable; durable PU coil cord allows you extremely get long term usage experience Non-slip durable PTT with sensitive mic; push to talk button and remote mic allow you clip it to collar close to mouth to transmit clear for hands free conversations The remote mic speaker with standard 2 pin k head plug type; former pin diameter of 3.5 mm and 2.5 mm in diameter after pin, double pin from 8 mm within; allows work with most brands walkie talkies;but not compatible with Motorola and Midland two way radios Strong swivel clips allow you to hold the mic in collar; pockets or other convenient place