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 low please remove the screws from the back cover and replace the new 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