Always pat your pockets before you leave your house, but don't always have your keys? We can help. Keep Hone on your keychain, and when you misplace your keys use the Hone app to make it flash and beep from up to 150 feet away. Hone works with iPhone 4S, 5, 5c and 5s, iPad 3, 4 and iPad Air, and iPad mini's. It weighs about half an ounce, lasts six months on a single CR2032 watch battery over average usage, measures 6x3x1cm and is assembled in the United States. We made it because we lose our keys and now we don't.