Rechargeable Personal Alarm: Our personal alarm adopts 3.7V 130mAh lithium battery. No need to replace the battery, charge it directly with the Type-C cable (included). After receiving it, please charge the alarm to activate it, otherwise it will not work. And when it beeps 3 times and the indicator light flashes 3 times, that means you need to charge it until the indicator light turns green. 130dB Loud Siren: The Secure personal alarm can make a loud sound to attract the attention of others even at 1000 feet. And the continuous piercing sound can last for 40 minutes. It is ideal for the elderly, children, students, women and anyone who works at night. Easy to useOur new personal alarm makes it simple to use the alarm for make sure you get out of danger as soon as possible. Press the alarm button twice quickly to activate the alarm and strobe light. Long press the alarm button for 3 seconds to turn it off. Bright LED light: This new version of the personal alarm is equipped with a 1W bright light bead. It has two modes, LED flashlight and strobe light. Press the light button once, the light is on; Press again, the indicator light flashes; Press a third time, the light turns off. MINI SIZE: The size of the personal alarm is 68.8*26*17mm, and the weight is only 18g, small, lightweight and portable. It is a wonderful self-defense tool for you. You can take it with you every day, hang it on your backpack, belt or key ring. Weight: 18 g Sold by the grid cool store