The addition of Pre-Roll video gives you four seconds of video before the detect event. This is very helpful in getting a better idea of what happened leading up to the notification from your doorbell.
eBay
Upgrade your home security with the Ring Chime Door Bell 2nd Generation. This modern and stylish door chime is suitable for any rectangular shaped door and is powered by a wall plug-in. The unit has a polished nickel finish and a round button shape made of plastic. This wireless door chime has a power of 30W and a voltage of 240V. It comes with a ring chime and is manufactured in China. The unit is easy to instal and has a manufacturer warranty of 1 year. Personalisation options are available, and the unit does not require any batteries. Suitable for any home, this Ring Chime Door Bell is a must-have for your home security needs.
eBay
Long Standby: No disassembly cycle charging. Built-in lithium-ion high-capacity battery, long standby. Capture Screen: Storage to the cloud, security protection drip. 1 Wireless Doorbell. Connection Mode: 2.4G WiFi.
eBay
Rainproof: The doorbell can be installed outdoors, and you are no need to worry about it is drenched by rain. Live video two-way audio ，Video doorbell with 100° wide-angle lens via APP, compatible for ios and android.
eBay
(Support video intercom, night vision IR. 2)Silver Kit : 1x Doorbell（Installing accessories ）. 3) Black Kit: 1x Doorbell（Installing accessories ）. Recording mode: manual, ringing trigger, motion detection.
eBay
Indoor unit 6 Dingdong music switching. No WIFI video doorbell, more secure information;. Ultra-low power consumption of doorbell, ultra-long standby;. Video two-way intercom;. Audio information: built-in speaker, microphone.
eBay
See, hear and speak to anyone at your door from anywhere with Ring Video Doorbell 3. With Advanced Motion Detection and Near Motion Zone features you can adjust your motion settings, allowing you to focus on specific areas to save your Video Doorbell 3 battery life and only receive notifications when you want.
eBay
V5 Wireless 166° Wide-Angle Security Doorbell. 1× Doorbell Host Unit. Smart PIR Motion Detection. 1× Installation Kit (Screws & Wall Glue). Noise-Canceling Bi-Directional Audio. Power Consumption Standby: 400μA Active: 200mA.
eBay