Feature: 1. 2 ways to use: The product supports SOS + pull ring alarm. In case of emergency, open the pull ring and call the police immediately, and insert the pull ring back into the hole to release the alarm. . Quickly double-click the SOS button twice to issue an international general alarm sound, and long press the SOS button to cancel the alarm. 2. Loud sound and bright light: Personal alarm supports dual alarm modes, strong light flashing and 130db loud sound. LED light can also be used as emergency lighting. 3. USB charging: The alarm is built-in 130mAh battery, which can continuously illuminate for about 75min, alarm for about 50min, and flash for about 5.5h. And it supports USB port charging such as power bank, computer and charger, which is easy to use. 4. For self protection: This smart self protection gadget is especially suitable for girls to go home at night to avoid being tailgated, children in distress, and elderly people falling or falling ill. 5. Mini and portable: It is about 134 x 41 x 21mm/5.28 x 1.61 x 0.83inch(total length including ring x width x height). And equipped with a key ring, the alarm is portable, which can be hung on personal items such as bags, keys, school bags, etc. Specifications: Color: White, black, blue, pink Material: ABS Power by: Built-in 130mAh battery Charging current: 1A Charging voltage: DC 5V Charging time: About 30min Lighting time: About 75min Alarm duration: About 50min Flashing time: About 5.5h Waterproof level: IP44 Sound: 130db Size: About 134 x 41 x 21mm/5.28 x 1.61 x 0.83inch(total length including ring x width x height) Package Includes: 1pc x Personal alarm 1pc x USB cable Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.