Wolfwhoop SP63B Solar-Powered Motion Detector Alarm with Remote Controller Super Loud 130dB Siren-Black Low battery LED indicator Ultra loud 130dB siren to drive intruder away and notice your surroundings Simple operation and DIY installation, no wiring required,Base unit uses 3pcs alkaline batteries Unique design and alumina shell: Consumer preferred, aesthetically pleasing for the home setting Wide monitoring range with 120-degree detection angle and effective distance up to 25 feet or 8 meters away