Feature:1. POWERFUL SIGNAL TRANSMISSION: Wireless doorbell utilizes advanced transmitter technology to ensure stable and reliable signal transmission, eliminating any signal loss issues.2. ENERGY SAVING: Wireless doorbell built in energy saving technology maximizes battery life, reducing the frequency of battery replacement.3. MULTIFUNCTIONAL APPLICATION: Suitable for both home and office settings, our doorbell can be used as an indoor doorbell, pager system, or security alarm device, serving multiple purposes.4. CONVENIENT INSTALLATION: With a simple and quick installation process that requires no professional skills, our doorbell can be easily installed within minutes, providing convenience for users.5. DURABLE MATERIAL DESIGN: Made of excellent ABS material, our doorbell is designed to be durable and corrosion resistant, ensuring long lasting use without easy damage.Specification:Item Type: Wireless DoorbellMaterial: ABSDoorbell: 3 x AA batteries (not included)Receiver: 1 x 12v23a 60mAh (included).Package List:3 x Screws1 x Sticker1 x Soft Pad1 x Receiver1 x Transmitter1 x 12v23a Battery1 x Lid Opener