Features: 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 Reminder_x000D_ Material: ABS_x000D_ Color: White_x000D_ Battery: 3 x AAABatteries (Not Included)_x000D_ Detection Distance: Approx. 0-5m/0-16.4ft_x000D_ Sound Pressure: 75dB-95dB5dB_x000D_ Induction Method: Infrared Induction Trigger_x000D_ Volume: Four Levels Adjustable_x000D_ Detection Angle/Range: 60 Degrees Up and Down, 110 Degrees Left and Right_x000D_ Ambient Temperature: -25-55_x000D_ Uses: Home, Shop, Shopping Mall PackageList: 1 x Infrared Sensor Doorbell 2 x Screw 2 x Expansion Tube 2 x Double Sided Adhesive Sticker 2 x Sticker