Alarm.com ADC-VDB781B

The Alarm.com ADC-VDB781B is a battery-powered video doorbell designed to protect entryways where traditional doorbell wiring may not be available. Its rechargeable battery supports flexible placement at front doors, side entrances, gates, detached garages, and other locations. It connects directly to a home's WIFI network without requiring a separate hub.

The camera captures square 1536 × 1536 video at 2.4 megapixels, with a 148° horizontal and vertical field of view. This wide, square image helps cover the area around the doorway. Infrared night vision provides visibility up to 15 feet (5 m), while the built-in passive infrared sensor detects motion to help trigger recordings and alerts.

Alarm.com video analytics can identify people, animals, and vehicles. The ADC-VDB781B also supports package detection and Familiar Face analytics, helping users receive more meaningful notifications about activity at their entrance. Privacy zones allow selected areas of the camera's view to be excluded. Perimeter Guard features can play warning sounds, and AI deterrence features provide additional ways to respond to activity.

Full-duplex two-way audio lets users hear visitors and speak with them through the Alarm.com app. The doorbell can also work with compatible mechanical or digital chimes when connected to existing doorbell wiring. For battery-only installations, the included rechargeable battery pack can be removed for charging or replaced with a charged pack to reduce downtime.

The included battery has a capacity of 6,450 mAh and takes approximately five hours to charge. The doorbell can also charge through supported existing wiring when it receives sufficient AC or DC power. It supports dual-band 2.4 GHz and 5 GHz WIFI 5 connectivity, along with Bluetooth 5.4 for setup. An IP54 rating provides protection against dust and water splashes for outdoor installation.

The ADC-VDB781B includes a mounting wall plate, an optional 5° tilt wedge, mounting hardware, wall anchors, a security screw tool, and a USB-C charging cable. For installations that need a replacement or spare battery, buy the Alarm.com ADC-VACC-BAT-2LIB replacement battery.

Specifications

• Brand: Alarm.com
• Model: ADC-VDB781B
• Product Type: Battery-powered video doorbell camera
• Maximum Resolution: 1536 × 1536 (2.4 MP)
• Video Compression: H.264
• Image Sensor: 1/3-inch color CMOS
• Field of View: 148° horizontal × 148° vertical
• Night Vision Range: Up to 15 ft (5 m)
• Motion Detection: Passive infrared (PIR)
• Video Analytics: People, animals, and vehicles
• Additional Features: Package detection, Familiar Face analytics, Perimeter Guard, AI deterrence, privacy zones
• Audio: Full-duplex two-way audio
• WIFI: 2.4 GHz and 5 GHz, Wi-Fi 5 (802.11b/g/n/ac)
• Bluetooth: Bluetooth 5.4
• Ethernet: Not supported
• Battery Capacity: 6,450 mAh
• Charging Time: Approximately 5 hours
• Wired Charging Input: At least 8 VAC at 60 Hz, 10 VAC at 50 Hz, or 5 VDC at the doorbell terminals
• Ingress Protection: IP54
• Operating Temperature: -4°F to 113°F (-20°C to 45°C)
• Operating Humidity: 20%–100% RH, non-condensing
• Dimensions (W × H × D): 2.0 × 6.3 × 1.34 in (51.3 × 160 × 34 mm)
• Regulatory Compliance: FCC, IC, CE, RCM
• Included Accessories: Universal battery pack, wallplate, 5° tilt wedge, mounting screws, anchors, rubber spacers, security screw tool, USB-C charging cable, installation card