Personal alarm is the most recommended giftacute; for your family members, your girlfriend, your friends who work night shift or travel alone.Security Alarms: 1. The 140 db decibel volume will instantly attract everyone's attention, even from afar. 2. Ideal gift for elderly parents, women, children, joggers or anyone who walks alone. 3. The alarm helps you; get out of a dangerous and serious situation; chase away attackers when traveling around; exterior.Characteristics: Alarm volume: about 140 dB Material: ABS+meacute;tal Voltage: 4.5 - 6 V Working current: 100 mA Battery: LR44 (5 pieces) Alarm time: 90 minutes Intensity; luminous: 80 lumens Size: approx. 2.76 x 1.77 x 0.98 inch Color: purple, blue, silver, gold, black Quantity: 5 pieces of security alarms; Suitable range: people of all agesWarm Notes: 1. When the alarm sound becomes low, please remove the back cover screws and replace the new batteries. 2. The alarm sound is very loud, please do not put it through your ears. 3. This item is not completely waterproof, please store in a clean and dry place.Package included: 5 x personal alarm 5 x User manual