Chipolo 2nd Gen 110026 Bluetooth Key Phone Car Luggage Wallet Item Finder & Selfie Remote, Cherry Red Use Chipolo to track and find your keys, wallet, laptop, backpack and even your pet Its about the size of a coin and just 5mm thin Free app connects effortlessly to all major smart phones: iOSandroid and Microsoft Proprietary antenna design gives Chipolo the longest range (60m/200 feet line of sight) Uses a replaceable standard watch battery (6 month battery life)and extra battery is included