Soon, you’ll be able to control the new Apple Watch without even touching it. The new system could herald a coming revolution in computer interfaces.

At its recent Wonderlust event, Apple showed off Double Tap, a new feature that lets you control your Apple Watch by simply tapping your index finger and thumb together twice. It’s one of a growing number of ways to control computers without touch.

“Imagine being able to control your watch while holding a cup of coffee on the other hand,” Steven Athwal, president of The Big Phone Store, told Lifewire in an email interview. “The biggest drawback to wearable tech like smartwatches to date has definitely been that you need two hands to operate them, but double-tapping is a window into one-handed control for your smartwatch. Most of us already use our smartphones with one hand, so using two hands to operate a smartwatch can feel like this device is making things harder, not easier.”

The Double Tap gesture is a new way to interact with your watch without having to make contact with the screen. You can perform actions such as answering a call by tapping your index finger and thumb twice simultaneously on the hand you wear your watch on. This new interaction method is intended to simplify using your watch without having to use your other hand.