Material: ABS<br>Size: about 13.2*3.5cm/5.19*1.37 inch<br>Volume ≥: 130dB<br>Lighting function: LED lighting<br>Working voltage: 5V<br>Working current: 1mA<br>Lighting time: about 75min<br>Alarm time: about 50min<br>Flash duration: about 5.5h<br>Battery capacity: 130mAh<br>Waterproof: IP44 waterproof<br><br>Package List<br>1* anti-wolf alarm<br><br>1、Perfect for: Suitable for people at all ages such as students, elderly, children, women, night workers, night runner and so on. 2、 Portable design:The safety alarm keychain has a portable size for easy storage and carrying,it can be attached to bags, belt loops, suitcases, keys, dog belts and so on. 3、 Personal alarm:The emergency alarm can make a 130dB loud sound to draw attention to protect you from having an emergency.What&#39;s more, the sounds could last 50 minutes continuous ear-piercing alarm at full power. 4、 With lights:When you pull the alarm, the LED will open the flash mode accompanied by loud alarm sound and dazzling flash lights. 5、 IP44 waterproof :It&#39;s waterproof and makes your alarm more durable on rainy days or by accident.