While many wearable device makers tout personal safety uses, Revolar has a unique take on the concept.

When the user presses a button, it sends an SMS message to a predefined list of contacts, along with the location, so they can call for help. Revolar keeps sending alerts every three minutes until the user is safe.

The device has a very personal meaning to its creator. Revolar founder and CEO Jacqueline Ros created it after her younger sister was assaulted twice before turning 17.

“It made me wish there was some way my sister could have had a ‘magic button’ to press so we could have known what was happening to her,” she said. “I began to research, and I couldn’t find a single nonviolent safety solution that my sister could carry with her everywhere. When I told her my idea for Revolar, she immediately began to cry, and I knew that I had to make my idea a reality.”

The device is designed to be unobtrusive, slipping undetected under clothing. Instead of constantly monitoring the user, it only sends data once the button is pressed. It features a 360-degree button so that it can be depressed easily, but is contoured to help prevent false alarms. Revolar’s battery will last up to a year.

“I didn’t want to make Revolar a ‘big brother-type’ wearable that constantly tracks someone’s location,” Ros said. “The ultimate goal is for Revolar to support the wearer in learning and being responsible with personal freedom. I want to inspire confidence in the wearer, not a feeling of being constantly supervised.”

Revolar has created a Kickstarter campaign to fund the device. With a week to go before the deadline, it’s already raised $73,351 of the $75,000 needed for Ros to produce the device, less than $2,000 to meet the goal, with 802 backers.

If it does meet the goal of the Kickstarter campaign, it will retail for $99. Kickstarter backers can have the device for $75, as well as donating them anonymously to a women’s shelter.