Equipped with touch + vibrations double sensors and 120dB alarm, this door handle alarm three sensitivity levels and two alert modes ( buzzing / alarm) for instantly intrusion detection without complex wiring Features three adjustable sensitivity settings, a sliding switches ( buzzing / ALARM / OFF), and battery powered operations ( requires 3pcs 1.5V batteries, not included) for flexible customization Compact yet powerful, this built device activates within 0.5 seconds of detected motion, ear piercing alerts to deter potential intruders effectively Ideal for entry points like patio doors, bedroom window, or garage entrances where sudden vibrations or tampering may occur Designed for homeowners, renters, and apartment dwellers seeking enhanced protections against unauthorized access to doors and window, Manufacturer: Greabuy