Feature: 1. Easy Installation: The doorbell is easy to install, no wiring or special tools required. Simply adhere it on the bracket, choose the right location, and stick it on the door for immediate use. 2. Wide Working Range: With a maximum induction distance of 2 to 7m (6.6 to 23.0ft) in open areas, this store doorbell will play your preset ringtone when your door is opened, allowing you to know if the door is open. 3. Greeting Function: Install it at the top of the door or wall, adjust the sensor angle freely to the right position, and the welcoming sound will notify you when guests enter. 4. Compact Size: The motion sensor doorbell is designed in a compact size that won't take up any extra space in your home settings. The small size allows you to place the doorbell anywhere you want. 5. Versatile Use: The motion detector doorbell is suitable for using in stores, business, hone, indoor, etc., catering various needs, can be used as a doorbell or a welcome machine. Specification: Item Type: Motion Sensor Welcome Doorbell Battery: 3 x AAA Batteries (Not Included) Sensing Range: Approx. 2-7m / 6.6-23ft . Package List: 1 x Sensor Doorbell1 x Double Sided Adhesive Tape2 x Screws Note: Avoid installing this product in places with direct strong wind or near heat sources (such as air conditioner outlet, exhaust fan, electric stove, or heater), and do not install it in places exposed to sun or rain.