While there's no guarantee you'll never lose your wallet, there's now a darn good chance you'll easily find it again. Ekster Wallet + Tracker is a slimline leather wallet, fashioned from high-end European leather with space for multiple cards, and infused with solar-powered tracking technology and the second generation RFID/NFC blocking. A single solar charge lasts up to three months, it's voice-activated and even rings when called.