Feature 1POWERFUL SIGNAL TRANSMISSION: Wireless doorbell utilizes advanced transmitter technology to ensure stable and reliable signal transmission, eliminating any signal loss issues. 2ENERGY SAVING: Wireless doorbell built in energy saving technology maximizes battery life, reducing the frequency of battery replacement. 3MULTIFUNCTIONAL 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. 4CONVENIENT 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. 5DURABLE MATERIAL DESIGN: Made of excellent ABS material, our doorbell is designed to be durable and corrosion resistant, ensuring long lasting use without easy damage.Item Type: Wireless DoorbellMaterial: ABSDoorbell: 3 x AA batteries (not included)Receiver: 1 x 12v23a 60mAh (included) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List3 x Screws1 x Sticker1 x Soft Pad1 x Receiver1 x Transmitter1 x 12v23a Battery1 x Lid Opener