5 Mode Motion Sensor Alarm: Not only serves as a motion sensor detection alert, but also has other functions. Welcome / Doorbell / Alarm / Colorful light / Lighting pattern. Motion detectors are essential in a home security system. It can detect movement in the surrounding areas - driveways, porch, gates, home, sheds, offices, driveways, swimming pools, stores, etc. And trigger an alert to the linked receiver. It provides an extra level of security and safety to your property and loved ones. 5 languages / 36 ringtones / 4 brightness and color / 4 adjustable volume levels: 5 selectable greeting languages in mode welcome. 36 ringtones selectable in doorbell mode. The welcome/doorbell/alarm model has 4 adjustable volume levels. The color light/light mode is quiet and has 4 adjustable brightness levels, ideal for the hearing impaired or if there is a sleeping baby in your home. The color light pattern also has 4 selectable colors. Sensitive & Wide Wireless Range: Motion sensor alarm picks up motion from a wide expanse of space, with a working range of up to 280m/918ft between receiver and motion sensor . Infrared sensor detection range about 4-8m/13-26ft to keep you informed and safe. You can place the motion sensor on the porch, porch, mailbox, and place the receiver in your house. Expandable Wireless Home Security: Flexible design according to your actual needs. You can choose the quantity of transmitter and receiver as you like, which can be freely matched, and set special lights or ringtones with each other. Each receiver of this motion detector detect alarm can work with 32 motion detectors and 8 remote controls at most. Easy to install & Usage: The device can be used by connecting a USB port or installing it with batteries (the infrared sensor needs three AAA batteries and the receiver needs three AA batteries) to make it work. Both the infrared sensor and the receiver have a mounting base. The infrared sensor can be rotated 360 degrees left to right and 180 degrees up and down. So easy to install and can rotate to any position you need.