Modes Motion Sensor Alarm: Not only serves as a motion sensor detect alert but also has more other functions.Welcome / Doorbell / Alarm / Color light / Lighting Model. Motion detectors are essential in a home security system. It can detect movement in the surrounding areas - driveways, front porch, gates, home, sheds, offices, walkways, swimming pools, stores, etc. trigger alert to the linked receiver. It provides an added level of security safety to your property loved ones. 5 Languages/36 Ringtones / 4 Brightness Color / 4 Level Volume Adjustable:5 welcome languages selectable in welcome mode.36 ringtones selectable in doorbell mode.welcome/doorbell/Alarm model has 4 level volume adjustable. Color light/ Lighting mode is silent has 4 levels of brightness adjustable, great for people with hearing disabilities or there is a sleeping baby in your house. The color light model also has 4 colors selectable. Sensitive and Wide Wireless Range: The motion sensor alarm catches movement from a broad scope of space, with a Working Range up to 280m/918ft between the receiver motion sensor. detection range of the infrared sensor approximately 4-8m/13-26ft to keep you informed safe. You can put the motion sensor detector at the porch, gallery, mailbox put the receiver in your house. Expable Wireless Home Security: Flexible design according to your actual needs. You can choose the quantity of transmitter receiver as you like, which can be freely matched set special lights or ringtones with each other. Each receiver of this motion sensor detects alarm can work with 32 motion sensors 8 remote at most. Easy to Install and Use: The device can be used by connecting USB port or installing with batteriesinfrared sensor need three AAA batteries receiver need three AA batteries)to make it work. Both the infrared sensor the receiver have a mounting base. The infrared sensor can be rotated 360 degrees from left to right 180 degrees from top to bottom. So easy to install can rotate to any position you need.