Skylink SC-10W Wireless Home & Office Burglar Alarm System Alert Safety 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 - works with up to 15 Skylink security accessories LIFETIME SUPPORT - Toll free 1-800-304-1187, support@skylinkhome.com