As a leading factory in the security industry, we are proud to introduce our latest product, the 2.8" Digital Video Doorphone Outdoor Unit Model B9. This advanced device offers crystal-clear video and audio communication, ensuring you can always see and speak to your visitors, improving the safety and security of your property. The durable and weatherproof design ensures reliable performance in all conditions, while the user-friendly interface makes it easy to operate. Trust us to provide the best products and services to keep your home or business safe, secure and connected.