Here is a Walkie Talkie case for iPhone that helps you stay connected in the outdoors. The Bakeey A10 case has a 3500mAh power bank too. It protects your phone against drops. It helps you stay connected when your cell signal is not that great.
This walkie talkie case supports a public frequency band of 400 – 470MHz. It has a LED screen and cutout area for the iPhone cameras.