Techko S003X Indoor Motion Detector Alarm, 200 Square Foot Range, Ultra Slim Design Highly reliable infrared sensor detects motion within a 200 square foot area in a 15 foot x 60 degree pattern Built-in 100 db alarm or pleasant chime Standard 9-volt battery operation (not included) Low battery LED indicator Comes with 2 warning sticker which can be placed at possible points of entry