Know when someone touches your doorknob or deadbolt BEFORE they actually get in with the 2 in 1 Door Alarm and Personal Alarm System. Flipo designed the 2 in 1 Door Alarm and Personal Alarm System to be installed in seconds, without wiring, on any non-metallic door. If anyone touches your doorknob, the 2 in 1 Door Alarm and Personal Alarm System by Flipo alerts you immediately with an ear piercing alarm. Additionally, Flipo created the 2 in 1 Door Alarm and Personal Alarm System to only work with human touch, so no more false alarms! The 2-in-1 Door Alarm and Personal Alarm System is great protection against unwanted visitors and peace of mind while traveling. Watch the video for details on this product! Requires one 9 Volt Alkaline battery (Not Included).