With it's premium aluminium waterproof casing and replaceable battery; Orbit uses Bluetooth technology along with a free app to locate your keys. When out of range the last known GPS location will be shown on the map. Orbit will help you find your phone by making it ring, even on silent! It's also a selfie remote Connect this lightweight, anodised aluminium device to the free app via Bluetooth and you'll never need to search for your keys again. -Find your keys -Find your phone (even on silent) -Last seen GPS location -Selfie remote -Replaceable battery (CR2025) -Battery life up to 6 months -Waterproof (IPX6) -Separation Alarm -Built-in 90db loudspeaker -Free app for iOS and Android -Includes a keyring, an opener tool for battery replacement and one extra battery.