1. Modes Motion Sensor Alarm: Functions not only include motion sensor detection alerts but also others such as Welcome, Doorbell, Alarm, Color light, and Lighting Model. Motion detectors are important in a home security system. They can detect movement in surrounding areas like driveways, front porches, gates, homes, sheds, offices, walkways, swimming pools, stores, etc., and trigger alerts to linked receivers. They add a level of security and safety to properties and loved ones. 2. 5 Languages/36 Ringtones / 4 Brightness and Color / 4 Level Volume Adjustable: 5 welcome languages are selectable in welcome mode. 36 ringtones are selectable in doorbell mode. Welcome/doorbell/Alarm models have 4 level volume adjustable. Color light/ Lighting mode is silent with 4 levels of brightness adjustable, suitable for people with hearing disabilities or when there is a sleeping baby at home. The color light model also has 4 colors selectable. 3. Sensitive & Wide Wireless Range: The motion sensor alarm detects movement in a broad scope of space, with a Working Range up to 280m/918ft between the receiver and motion sensor. The detection range of the infrared sensor is approximately 4-8m/13-26ft to keep users informed and safe. The motion sensor detector can be placed at the porch, gallery, mailbox, and the receiver in the house. 4. Expandable Wireless Home Security: The design is flexible according to actual needs. Users can choose the quantity of transmitters and receivers as they like, which can be freely matched and set with special lights or ringtones. Each receiver of this motion sensor detection alarm can work with up to 32 motion sensors and 8 remotes. 5. Easy to Install & Use: The device can work by connecting to a USB port or installing batteries (infrared sensor needs three AAA batteries and receiver needs three AA batteries). Both the infrared sensor and the receiver have a mounting base. The infrared sensor can rotate 360 degrees left to right and 180 degrees top to bottom. It is easy to install and can rotate to any needed position.