Actually, a $230 doorbell. If you want a chime, as opposed to just getting email or app alerts every time a squirrel walks in front of your door, you’ll need to shell out for the $30 mains powered “wireless” chime.
But, having to locate the chime within power cord distance of an outlet may not be such a bad thing, because with RiNg, you have to actually unmount the device (using a special tool for the tamper-resistant screws) and take it out of service for 5 to 10 hours to charge the battery.
[quote]To charge your Ring Doorbell:
Remove your Ring Doorbell from the mounting bracket.Connect any micro USB charging cable to the charging port.Verify blue and white lights spin on the front of your Ring Doorbell. If no spinning lights, see below for next steps.Allow your Ring Doorbell to fully charge (may take up to 10 hours).
When the lights stop spinning and glow blue the unit is charged.
If the battery fully depletes, it may be necessary to go through a
setup of your Ring Doorbell to reconnect it to your WiFi network. If
your Ring Doorbell plays the correct tones after charging but does not
send a notification to your device, re-perform a setup.
[/quote]
Sooo convenient 
Of course, it is possible to power RiNg off of a doorbell transformer if your location for the transmitter unit is wired for it. Even so, the toted totally wireless capacity is marred by the unnecessarily award charging system that doesn’t just allow you to swap out the batteries and charge them externally. Curiously, the review mentions none of this, though it has time to glowingly note “The battery in the RING device is USB rechargeable and holds its charge for a full year!” Of course “holding” a charge for a year isn’t the same as only needing to be recharged once a year - which would likely depend on how much the power hungry video feature was used. The FAQ claims 6-12 month capacity for “normal” use.
Also, the video feature will work live without a subscription, but if you want to have archives you can access, you’ll need to shell out $3/mo or $30/year archives that last no more than 6 months. (Another detail curiously missing from the review.) Even so, this could be just the thing for some people.
