KERUI Personal Businesses and Homes DIY Security Alarm Kit- 110db Loud Alarm Horn Siren with 3 Door & Window Contacts,Remote Key Fob Easiest design!Easiest setting! Easiest control! With least money, get the most functional, qualified and convenient alarm system! Door alarm uses Remote control to set security code for arming/disarming 110-decibel deluxe door alarm for peace of mind Complete DIY security kit includes a horn and three window/door sensors,a remote controller,loud alarming to protect well. The horn support up to 30 pcs detectors,8 remote key fob,4 doorbell sensor,loud up to 110db