PAVEOS Battery Type Wireless Home Doorbell, Colorful Strong Flash, One Button Emergency Call Bell, Elderly Pager Features: Colorful flashing light while beling which is very helpful for deaf people and hearing impaired people Independent base for easy There are two hooks at the bottom of the base, which can hang keys,working cards or any other light (NO hanging of heavy objects) Easy installation NO wiring needed AA-1.5V batteries needed( Excluding ), it can work without power. Use the tape or screws and stickit to the outdoor wall ( tape and screws are in packing) DO not install the transmitter on metal The receiver advantage: Multicolor Cycle Flashing Product Description: Product includes: 1x receiver, 1x transmitter Househeld supplies for adult and children Design: Our smart household appliances adopts a close-to-life design, just to achieve a satisfying experience for you. Durability: This smart household appliances is made of sturdy and durable materials, which can maintain its functionality even after frequent use. Multipurpose: This smart household appliances can provide convenience for your daily life, whether it is for daily work or home leisure, you can also give it to your husband/wife/family, they will love it! Wide Selection: Discover an extensive range of household tools, from indoor to outdoor accessories, ensuring you find exactly what you need for your home . This smart household appliances will surely fulfill your needs! Service: If you encounter problems in the process of using smart household appliances, please feel free to contact us and we will solve them for you.