The ALC-KP1 wireless alarm keypad has a delay alarm to give you chance to enter the code or swipe your RFID tag before the alarm is triggered it also features emergency call, stay mode and mute mode functions and can be hard-wired to an electronic door lock to work as access control system. The unit will work with up to 50 separate RFID tags so more than enough for a home or small business. As the keypad is wireless it means that you can have the main alarm system in another room or at the front door and easily mount the keypad at the back door or side entrance for added convenience when entering or leaving the building. The keypad is powered by 3xAAA batteries and it will let you know when the batteries are running low. Comes with a 12 month warranty.