High Decibel Alarm --- The Door Handle Alarm Emits 120Db Alarm Sound, Which Can Quickly Attract People'S Attention. Even If You Are Resting And Sleeping, You Will Be Awakened By The Alarm Sound, Allowing You To Respond Quickly. One-Button Switch Control --- Easy Operation, Simple One-Button Switch Control Doorbell/Alarm, Dual Mode Can Be Selected When You Stay In A Hotel, You Can Install This Alarm On The Doors And Windows To Protect Yourself. You Can Take The Alarm With You The Next Time You Use It. Easy To Use --- The Alarm Does Not Need To Be Connected To The Wire (Only 3 Aaa Batteries Are Required, Not Included), Hang Simply The Button Inside The Door, Turn On The Switch And The Stern Alarm Will Remind All Unnecessary Strangers For You And Your Home Provides Good Protection. Wide Application --- The Alarm Has A Wide Range Of Applications And Is Very Suitable For Homes, Offices And Factories. After Installing This Alarm, When A Stranger Opens The Doors And Window, It Will Alarm To Check The Security. Wide Application --- The Alarm Has A Wide Range Of Applications And Is Very Suitable For Homes, Offices And Factories. After Installing This Alarm, When A Stranger Opens The Doors And Window, It Will Alarm To Check The Security.