Feature: 1. Pull out the pull ring to open the 120DB alarm sound which will continue one hour, flashing for ten seconds, dazzling the bad guys within 3 meters. 2. Adopt polymer lithium battery (built‑in), adopt protective circuit board lithium battery, voltage 4.2V, capacity 110mA. PCBA uses a charging protection scheme. Double protection to ensure peace of mind. 3. Easy to wear, snap‑on design, can be carried on keys, school bags,wallets and other personal belongings. 4. The elderly can carry it with them or hang an alarm by the bed at night, and trigger an alarm in case of emergency to provide timely assistance 5. Cartoon shape, exquisite and lovely, easy to carry, bring more convenience to you and your family. 6. The use method is simple, the alarm can be opened by pulling the pull ring, and the alarm can be released by inserting the pull ring back into the hole. Specification: Condition: 100% Brand NewItem Type: Personal AlarmMaterial: ABS PlasticColor: As the Picture ShownAlarm Volume: 120dB Power Supply: 3.7V 110mAh (Built in Lithium Battery)Charging Time: About 40 minutes Full Power Standby Time: 2 Years. Package List: 1 x Personal Alarm1 x USB Cable Note: The sound of the alarm is high in decibels, please do not ring it in your ear.