Personal Alarm JW-LD44 emits an extremely loud noise to deter attacks and to protect personal safety. The slim size one is designed for ladies or people who walk home late at night or for night-shift workers. Features: * With compact, tough plastic case, slim size, suitable for people who come home late or night workers. Best protector for women, children, and the elderly. * Use the key ring to fix the alarm on handbag or purse and clip the rip cord on belt loop. The alarm is activated by pulling the rip cord that removes the plastic plug from its socket. Specifications: Alarm Output: 110 dB Battery: " N" x 2 Size ( mm) : 65 x 30 x 25 mm Color: Black, Yellow