Denver VDB-110 is a smart video doorbell that lets you see, hear, and speak to visitors from your phone, tablet, or computer. It features a 166° HD camera with night vision, two-way audio, PIR motion detection, and a built-in rechargeable battery. The doorbell can be powered by either external AC power or battery, and it's compatible with both iOS and Android devices. With the ToSee app, you can receive instant notifications when someone rings your doorbell, view live video footage, and even use the two-way audio to talk to visitors.