Feature:1. Convenient Installation: 180rotation, suitable for installation on walls or other objects at any angle, flexible adjustment to meet requirements.2. Long Distance Sensing: Long distance infrared sensing, infrared sensing up to 5 meters, more sensitive and safer protection.3. High Quality Material: Made of ABS material, sturdy and durable, and long service life.4. Multi Function: The doorbell can also be anti theft. During the day when guests enter, there will be a welcome message, and at night, an intruder will sound an alarm.5. Multi Purpose: It can be used as a motion sensor ringtone, door alarm, mailbox alarm, retail business welcome doorbell.Specification:Item Type: Infrared Smart ReminderMaterial: ABSColor: WhiteBattery: 3 x AAABatteries (Not Included)Detection Distance: Approx. 0-5m/0-16.4ftSound Pressure: 75dB-95dB5dBInduction Method: Infrared Induction TriggerVolume: Four Levels AdjustableDetection Angle/Range: 60 Degrees Up and Down, 110 Degrees Left and RightAmbient Temperature: -25-55Uses: Home, Shop, Shopping Mall.Package List:1 x Infrared Sensor Doorbell2 x Screw2 x Expansion Tube2 x Double Sided Adhesive Sticker2 x Sticker