Smart Locks / Wireless Buzzer System

[Alex V.]

I recently purchased a 3 Family that doesn't have an intercom system and the front door relies on tenants remembering to lock it behind them as they leave. I curious if anyone here has a suggestion for a system that doesn't require hardwiring to install. Ideally one with keyless entry too. I've read about how they are less secure however this property is in an A+ town so it's not a giant concern for me. The big names like Ring and Nest seem to be only set up for single family homes. Does anyone here use a wireless or keyless entry system for their units?