110-Decibel Loud Alarm A security alarm with a volume of approximately 85dB, uses 2 AAA batteries. It sounds when the string is pulled. Keychain type. (The string can be replaced with your favorite decorations, etc.) For crime prevention during school commutes, work commutes, etc. Although it is new and unused, it has been stored for a long time. Please purchase only if you understand this. It will be sent in simple packaging such as an envelope in a plastic bag. - Model: BH-210P - Color: Red - Volume: Approximately 85dB - Batteries: Uses 2 AAA batteries - Example of use: Security alarm Made by National, Matsushita Electric Panasonic Thank you for viewing.