130DB THE ORIGINAL DOOR STOP ALARM WITH BATTERY INCLUDED (VIGILANT PPS-PA21) Door Stop Alarm : Works with most doors to provide a second level of door lock while alerting you to attempted entry Loudest : 130dB emergency alert alarm - one of the loudest door stop alarms ever manufactured Battery Included : 9V battery included so you can use the alarm right out of the box Best design: Anti-slip rubber grip traction pad on the bottom so that the unit works on all types of flooring including tile, wood, and vinyl VIGILANT WARRANTY: Vigilant alarms come with a full 1 YEAR WARRANTY. We're a Florida, USA based company with employees and product manufacturing in America and China. All Vigilant pepper spray is manufactured in the United States. Our alarms are designed in the United States and manufactured in China.