4 Work modes optional you can chooseThe solar alarm motion detector with sound have four mode, 24 hours with flash and alarm24 hours with flash but without alarm12 hours with flash and alarm12hours with flash but without alarm Sturdy made & waterproof IP65-rated water resistant with sturdy casing,allows your solar alarm lights outdoor siren for optimal performance year-round and in all climates. Long lastingAfter fully charged under sunlight, the solar sound alarm can work for about 30 days. No worry run out of power. Motion ActivatedSensitive motion sensor will detect any movement within 5-8 meter and activate the sound light alarm, sound arise and strobe light on. Easy Installation & Widely usePlease hang solar strobe alarm where get enough sunlight. The outdoor motion sensor alarm strobe light is suitable for your farm, villas, garage,yard and other places where need security alarm. Item No.1766629606