Description:1. Open the back cover and install 3 AAA batteries.2. Set the sensitivity level you need, usually mid-range.3. Turn on the side switch, upwards is a strong alarm sound, and downwards is a door bell.4. Quickly hang on the door handle after setting.5. When the red light flashes for 30 seconds and then stops, the product officially enters the standby state. At this time, someone outside the door touches the door handle and the alarm lasts for about 1 minute, and then automatically stops, and the red light flashes for 30 seconds to enter the standby state again.6.Adjustable sensitivitySpecifications:Name: Door handle alarmPacking: white boxModel: IN03B whiteAlarm decibel 115dBSingle weight: 65 grams (without batteries)Material: ABS plasticPower supply: three AAA batteriesProduct size: 65*37*15mmPackage Included:1*Smart lock