The Esatto is an accessory that can be added to your Baratza Encore, Virtuoso or Preciso grinder. It plugs in to your grinder and allows you to program up to 3 different doses that can automatically be ground with 0.1 gram accuracy.
Weight based grinding is the best way to get accurate dosing for your coffee brewing. It's much more accurate than time-based grinding. The Esatto was originally designed for use in cafes to more consistently and accurately dose coffee for brew bar applications. In your home environment it makes grinding and dosing for any of your home brewing methods much easier.