Features: Personal security alarm in decibels, proximity test at 130DB. Smooth line, high quality, small and exquisite, practical and durable. With stainless steel belt clip, easy and convenient to carry. An ultra strong key ring can be hung on the bag or on the key. Simple operation, women or students just pull out the link inserted at the bottom to open the alarm to help when needed. An ideal gift and practical alarm for the elderly, night walkers, sportsmen, the disabled. Specification: Condition: New Material: ABS Color black Battery: 3 * AG13 batteries Volume: 130DB Keychain length: approx. 17 cm Size: Approx.66.5 * 42 * 24mm / 2.6 * 1.7 * 0.9in Package weight: approx. 54g / 1.9oz Package List: 1 * alarm personal safety 1*User Manual Note: The data is manual measurement, please allow 1-145cm error, due to differences between light and screen there will be a certain color difference, the specific received in kind prevail.