Walkie talkie lets Microsoft teams users turn smartphones or tablets into a walkie-talkie that works over cellular data or Wi-Fi. The feature launched widely on Android in September of 2020, but now Microsoft says it’s available for zebra mobile devices as well as iPhones and iPads.

Software maker’s collaboration with zebra technologies makes it work with a push-to-talk button for quick and secure communications. These devices are used widely by frontline workers, the employees that have helped steer the world through the ongoing pandemic.

Walkie-Talkie features are still rare in communications apps. Whatsapp lets you record snippets of audio than can be sent and received. Slack launched its own walkie-talkie feature on the Apple Watch in 2018.