Explained: HES ES100 Wireless Electric Strike

The HES ES100 Aperio Wireless Integrated Electric Strike and Card Reader is the most versatile way to retrofit an opening with real-time online access control.
Battery operated - no need to run wires to every opening
Universal compatibility for use with most latchbolt locksets
Factory installed or field upgradeable monitored options
Field adjustable integrated shim
Interchangeable faceplates & accessories
Motorized EcoStrike™ Technology

[@anthonyromano8565]

I still have no idea what an electric strike does and I install doors.

[@Thinkableness]

It allows you to electronically unlock/lock a door using a something that controls the flow of electricity