Mounting Type Floor Mount Material Stainless Steel,Plastic Color Black amp; Stainless Steel Style Safety Item Dimensions LxWxH 1.18 x 0.79 x 0.79 inches Number Of Pieces 3 Package:3 x Door Stop Alarm: This is an upgrade door stop than others.It is more durable than others with better quality. 3 Sensitivity LevelsLow MediumHigh,with an adjustable sensitivity switch on the side. Very loud shrill that would definitely scare someone away with 120db alarm.Each Weight: 128g You can use it as common door stopper when turn down the ON/OFF switch,hold door in open position. No installation required.Each requires one 9vbattery(Not include).Portable and easy way to add peace of mind when traveling or working alone. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.