You probably already know that you can use your Apple Watch to ping your iPhone as long as they're close to each other. (Open Control Center on your Watch and tap on the Ping icon, the button with the iPhone and sound waves coming out of it.) Your iPhone will beep a few times; you then repeat the process until you find your phone.
But wait, there's more.
As explained by a Reddit post from late 2015 I stumbled across by accident last week, if you long-press on the Ping icon the iPhone will not only play a sound, but the flash will blink several times to help you find your iPhone in the dark.
A feature that was likely designed with accessibility users in mind is useful in more than one scenario.
Your iPhone's screen will need to be off for this to work, and as you can see it's bright enough to grab your attention even in a well-lit room.
All the latest Apple news, featuring developments on the iPhone, iPad, Macbooks, OS X and much more.
Mar 244-year-old gets Siri to help save mom's life
Mar 24How to tether your iPad to your phone
Mar 23Reactions to the iPhone 7 Product Red, new iPads and clips
Mar 23iPhone 7 storage options: Why 32GB is likely not enough