Noisy instead of beeping! The beep of conventional reversing warning devices is quickly perceived as annoying and unconsciously ignored or even manipulated (or deactivated). The "white noise", on the other hand, always occurs. It can be easily located, even better than the otherwise used beep, and is no longer heard a few meters outside the danger area. Maximum perception of persons affected with minimal harassment of uninvolved persons. This is how safety must work. The "white noise" is designed for the middle application area such as road traffic and normal loud operating premises. With up to 97 dB you are also heard here.