Self-defense and anti-wolf device $ 4.89 Volume: 120 dB The main material is high quality ABS (shell) Battery model: 12V 23A (replaceable) Size: length 68 width 42* thickness 23mm Color type: black printing Applicable people: children, ladies, elderly, etc. How to use: Pull out the pull ring switch, immediately The alarm sounds about 120 decibels, plug in Pull back the ring to turn off the alarm.