There are plenty of times when wireless service providers can come up short. So when traveling with friends to far-flung places, crowded concerts, or even during power outages, it’s nice to know you mesh networks offer a chance to create your own connections.

GoTenna Mesh Secure Portable Networks offer a way to stay connected when your providers can’t. By connecting your phone to the portable antenna, you and anyone else in your crew with a paired antenna create a private, encrypted network. Even better, it gets stronger and larger the more people you add on.

So you can send secure texts and GPS locations with one another without any other service required. All you messages come with the same delivery confirmations you’re used to, and you can access free offline maps of areas around the world. Additionally, depending on your needs, you can choose to carry your relay with you, or leave them in strategic places. That means a lot more communication flexibility for all sorts of situations. No wonder they’ve raised over half a million dollars on Kickstarter.

Buy now: Get a pair of GoTennas for $155, that’s a 13 percent discount.