California surfer/entrepreneur Jeff Overall is the founder of PolarPro, a company that started out making snap-on filters for GoPros and drones. He pitched his lucrative business on Shark Tank in 2015 and made a deal with two sharks: Robert Herjavec and Mark Cuban both invested $500,000 for 10 percent of the company.
Since Shark Tank, Overall has stayed true to his plan to expand the PolarPro brand into the smartphone market. PolarPro has teamed up with Otterbox to create a line of sleek, snap-on accessories for smartphones including an extra battery, a card reader, a fish-eye lens, and a pair of speakers that clip onto the back of a phone, among others. The PolarPro BeatPulsar Bluetooth speaker weighs 3.5 lbs., cost $60, and can work as a conference call speaker, too.Most INTERESTING FINDS on Amazon]