White. The YALE wireless shed and garage alarm is an ideal solution to secure buildings outside of the home such as sheds, garages, outbuildings and caravans. It features a loud 100dB siren with motion detection which sounds the alarm after 10 seconds if the 4 digit pin is not entered. It can be free standing or fixed and is powered by 4 x AA batteries (not included).. Standalone wire free and battery operated. Loud 100dB siren. Low battery indicator. 12 metre detection range