Personal alarm is the most recommended gift;for your family members, girlfriend, friends who work night shifts or travel alone.Safety Alarms: 1. 140db decibel volume will instantly grab everyone's attention , even from a distance.2. Ideal gift for elderly parents, women, children, joggers or anyone who walks alone.3. The alarm helps you to;get out of a dangerous situation andhunt attackers when traveling tooutside.Features: Alarm volume: about 140dB Material: ABS + metal Voltage: 4.5 - 6V Working current: 100mA Battery: LR44 (5 pcs) Working hour alarm: 90 minutes Intensityluminous: 80 lumens Size: approx.2.76 x 1.77 x 0.98 inch Color: purple, blue, silver, gold, black Quantity: 5 pieces security alarmsSuitable range: people of all ages Warm Notes: 1. When the alarm sound becomes , please remove the screws from the back cover and replace the batteries.2. The alarm sound is very loud, please don't put it by 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