From pets to keys, if you want to know exactly where they are, get this amazing Portable Bluetooth Tracker for smartphones app interaction.
Alert: Beep, built-in LED light
Battery: CR2032 lithium coin battery
Transmission distance: About 10m
Compatibility: iPhone4S / 5 / 5S / 5C, iPad Mini, iTouch 5, iPad 3 / 4, iPad Air and Android systems with Bluetooth
1 X Portable Bluetooth Tracker