If you pull out the to open the 120DB alarm sound which will continue one hour, flashing for ten seconds, dazzling the bad guys within 3 meters. Our emgency alram adopts polymer lithium battery (built‑in) and uses a charging scheme. Double to ensure peace of mind. Our personal safety alarm is easy to wear, snap‑on design, can be carried on keys, school bags,wallets and other personal belongings. The elderly can carry the self defense alarm with them or hang an alarm by the bed at night, and trigger an alarm in case of emergency to provide timely assistance Made with cartoon shape, exquisite and lovely, easy to carry, this security alarm keychain can bring more convenience to you and your family., Weight: 0.1322773572 Pounds, Manufacturer: Sonew