This is a walkie talkie set for kids with 2 player system. Talking distance up to 100 feet. Extendable antenna (for Receiving Better Audio Signals and Less Disturbance during Transmission). Walkie talkie works on the simple physics principle, where we are converting audio signals into radio signals via antenna, later other walkie talkie will decode signals of radio into audio signals, then voice is heard. Build quality and antenna quality determines the quality of voice heard in walkie talkie conversations.