True it's not smartphone capable but is a good basic key finder at a good price point for around the house and garden.
I originally bought a set of these at a higher price for my inlaws, for a bit of fun, as they regularly seemed to be losing their keys or glasses around the house or in the garden, and they now love it.
You do need to initially purchase 2 AAA batteries for the transmitter but the CR2032s are included.
Kogan says: "The Wireless Remote Key Finder lets you locate your missing keys with the use of a handy remote. Simply attach one receiver to your keys, and find them by pressing the complementary remote, which alerts you when the keys are near.
Highlights:
Wide working range of 25-30 metres (open space)
Long-lasting battery life
Simple to use, lightweight and practical"
I keep misplacing my remote controllers, so I will need another finder to find the remote controller of this key finder.