Description: Good performance: This safe sound personal mini-alarm works with 140dB sound, and designed with LED Light and on/off function, which is an emergency safety alarm for women, men, children, elderly, etc. Use function: The emergency alarm can make a loud sound to draw attention to protect you from danger, it is effective as far as 600ft distance. Reliable material: The alarm emergency is made of sturdy durable ABS plastic, this alarm keychain is fall-resistant and not easy to crush. Suitable person: This alarm emergency is a good supply for night lighting, suitable for people at all ages, such as students, elderly, children, women, night workers and so on; Wide application: This alarm emergency can also be used when traveling, hiking, camping and dog walking at night. Specification: Material: ABS. Color: black, gold, silver, for purple, blue. Size: Approx. 5x2.6x0.78 cm/1.97x1.02x0.31 inch. Note: Put out the contact pin of the rope, then you will hear super loud alarm sound. Insert it in, then alarm off. You can change new batteries by using a screwdriver to open the rear cover when the alarm sound begins to get quieter or after you have been using it for about 12 months. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow a slight deviation for the measurement data and make sure you do not mind before ordering. Package Includes: 1 Piece Safety Alarm Keychain.