Feature:1. It can emit a loud alarm sound of about 125 decibels, red LED warning light flashes when the alarm sounds.2. Suitable for students, elderly, children, women, night workers and other people of all ages.3. Made of quality ABS material, safe and eco-friendly, stable and durable.4. Light weight and in small size, easy to carry when going out.5. The back of the product is equipped with a magnet, which can be sucked on the refrigerator, window, door frames and other metals.Specification:Condition: 100% Brand NewItem Type: Safety AlarmMaterial: ABSDecibels: About 125 decibelsApplicable Battery: 3 x Button Battery LR44, 150mA in total (Not Included)Features: Use three LR44 batteries, can continue to alarm for more than 40 minutesFunction: Manual alarm, microcomputer infrared automatic induction, red LED warning light flashes when the alarm sounds.Scope of Application: Elderly, children, ladyHow to Use:1. Pull out the keychain, an alarm will sound, and plug it back in to stop.2. Push the switch to the AUTO position. After 15 seconds, it will enter the alert state with a single beep. After 15 seconds, someone will enter the front 120 degrees, within 5 meters, and an alarm will be issued. After 15 seconds, it will automatically stop and re-enter the alert state.3. The back of the product is equipped with a magnet, which can be sucked on the refrigerator, window, door frames and other metals..Package List:1 x Safety Alarm1 x Manual