Features: Security: Can be used as a single woman at night anti-wolf alarm, children's school on the road personal safety alarm, the elderly emergency rescue and other purposes. Louder: Loud alarm is up to 130dB, the sound can reach afar to help you get notice. Use: Pull out the plastic insulation film on the back and press the button on the front in case of danger, it will give out a high-decibel alarm. To stop the alarm, press the small button on the back. Purse / Bag / Key Ring Clip: Key ring with purse / bag / backpack clip - the ultimate personal protection alarm to carry on your purse or backpack. It is the alarm for attaching to your keys. Battery: Preloaded with heavy duty LR44 batteries, user replaceable and 365 day standby time. You can find replacement batteries at most stores. Portable key chain design, with a clip that can be easily clipped on bag or belt, easy to carry. Specification: Material: ABS Plastic Color: Black, Pink (optional) Sound: 130dB Built-in Battery: LR44 (You can find replacement batteries at most stores) Size: 7.5 * 1.5 * 3.5cm/3.0 * 0.6 * 1.4in Package Weight: approx.41g Package List: 1 * Personal Alarm 1、Security: Can be used as a single woman at night anti-wolf alarm, children's school on the road personal safety alarm, the elderly emergency rescue and other purposes. 2、Louder: Loud alarm is up to 130dB, the sound can reach afar to help you get notice. 3、Use: Pull out the plastic insulation film on the back and press the button on the front in case of danger, it will give out a high-decibel alarm. To stop the alarm, press the small button on the back. 4、Purse / Bag / Key Ring Clip: Key ring with purse / bag / backpack clip - the ultimate personal protection alarm to carry on your purse or backpack. It is the alarm for attaching to your keys. 5、Battery: Preloaded with heavy duty LR44 batteries, user replaceable and 365 day standby time. You can find replacement batteries at most stores.