The main benefit of using key finders is they will help to locate lost keys. You don’t have to change the lock or break into your house anymore.
Second, not only can they be used on keys but many different scenarios as well. They can be used as a communication device as a way to call another person in. They are often used in hospitals to call in nurses.
Key finders can be placed inside luggage when travelling to ensure that nothing is left behind or lost. They can also be attached on smartphones, laptops, wallet or camera.
Kids can be notorious at wandering alone. In a crowded setting, they can stress the parent when they get lost. A key finder can pin point their location. While this is not a full proof method, it does work.
The main drawback with key finders especially with the Bluetooth variety is that they do not come with a very large range. Most claim to have a range of 30 feet or more but the reality is the range is significantly less than that sometimes just 10 feet.
Radio frequency key finders have a longer range than their Bluetooth counterparts but they also suffer from obstruction by other RF devices and solid objects within the vicinity. Granted radio waves will go through walls but the frequency is reduced every time they go through an object. This affects their reliability especially over longer distances.