Elenco  Sound Reversing Robot Car Robot Car moves forward when it detects noise and reverses when it touches obstacles Uses a microphone as a sound sensor Fun introduction into the exciting world of electronics and robotics Comes complete with detailed easy to follow instructions Quality construction - some soldering required Robot Car moves forward when it detects noise and reverses when it touches obstacles Uses a microphone as a sound sensor Fun introduction into the exciting world of electronics and robotics Comes complete with detailed easy to follow instructions Quality construction  some soldering required