The Aosu Video Doorbell R1 Ultra is a smart doorbell that can be powered by batteries or connected directly to a home’s electrical system. It needs a separate device called the AosuBase Mini, which acts as a Wi-Fi connection point, indoor chime, and storage unit. The AosuBase Mini has 8GB of storage and can keep video recordings for up to 60 days. The doorbell itself includes a 5MP camera with a resolution of 2560 x 1920 pixels, allowing for detailed images. It also has a 6x digital zoom and a 4:3 aspect ratio, which is similar to traditional television screens. The device includes features like two-way audio communication, motion detection using radar and passive infrared (PIR) sensors, and AI-powered human recognition. Users can also set up custom detection zones to focus on specific areas. The doorbell is powered by a non-removable 5,000mAh battery that takes about six hours to fully charge and is expected to last six months under normal use. It includes a feature that allows users to answer the door using disguised voices, such as "uncle" or "clown," to protect their identity. It works with voice assistants like Amazon Alexa and Google Assistant and has an IP65 rating, which means it can withstand outdoor conditions like rain and dust. However, the AosuBase Mini must be placed indoors near an electrical outlet and is not designed for outdoor use. The Aosu Video Doorbell R1 Ultra is priced at £139.99 in the UK, $135.99 in the US, and around AU$190 in Australia. It is available in the UK, US, and across the European Union. The doorbell works without any subscription, offering features like motion alerts, live video feed, two-way communication, detection zones, and playback of up to 60 days of recorded footage. An optional cloud-based service called AosuProtect+ provides additional features like cloud backup, extended event recordings, remote playback, and faster video navigation. AI facial recognition is only available with AosuProtect+ and is exclusive to video doorbells. The doorbell has a 166-degree diagonal field of view, but the actual horizontal and vertical coverage is 133 x 103 degrees. It has infrared night vision that works up to 33 feet (10 meters) but does not include a spotlight or color night vision. The device comes with a 15-degree wedge for mounting adjustments and includes tools for hardwiring, such as a screwdriver, extension wires, and wire nuts. It received a design score of 3.5 out of 5, a performance score of 3 out of 5, and a value score of 4 out of 5. It is best suited for users who prefer not to pay for subscriptions, want voice disguise options, want fewer false alerts, and already have existing doorbell wiring. It is not recommended for those who need to see faces clearly at night or who would need to remove the doorbell to recharge it. Alternative options include the Ring Battery Video Doorbell (2nd Gen) and the Eufy Video Doorbell C31.