Very good used condition. This was installed to help with a senior family member's nighttime wandering. Description: "Get notified of visitors, intruders, or passers by with the SK630 Pressure Mat Alarm. The sensor is triggered when stepped on, activating a pleasant chime or loud alarm. With both alarm and chime modes, use the SK630 to add security or convenience. In Alarm mode, the sensor will trigger a loud (105dB) 30 second alarm. In Chime mode, it triggers a Ding dong, which sounds twice each time the mat is stepped on. The alarm also has an easy Off position, if there are times when you dont want it to sound. The SK630 is great in a variety of scenarios: Place it in front of entrance ways to get alerted to visitors or intruders. Use it at the top or bottom of stairs, in front of cabinets, or in other areas where little children should not be. Keep it next to the beds of children or the elderly who have a habit of wandering. Its also great for pets! Keep it at your back door to know when your dog or cat wants to go outside or come back in." Alarm volume: 105dB; Chime volume: 90 Db Mat dimensions: 21.75 x 13.75 Easy setup, no installation required. Alarm can be wall-mounted or not. Powered by 9V battery