Skylink SC-100W Wireless Deluxe Home & Office Burglar Alarm System Alert Security Package | Affordable, Easy to Install DIY NO MONTHLY FEES and easy DIY (Do It Yourself) installation Ideal for homes, apartments, convenience stores, gas station , condominiums and more ROLLING CODE TECHNOLOGY creates a new code everytime you remotely arm and disarm your system providing maximum security and reducing false alarms EXPANDABLE with up to 15 SkylinkHome security accessories Up to 100 FOOT REMOTE RANGE in open area.