The CHOICE Expert Rating is made up of the range score (50%) and ease of use score (50%). Due to CHOICE's position on button batteries and the dangers they pose to young children when ingested, we don't give any of these products a recommendation, regardless of the range and ease of use results.

Range is measured indoors and outdoors by slowly moving the phone away from the tracker until the signal drops, then back towards it until it reconnects. The measured range of each test is recorded and scored relative to the best performer in the test. These results are combined into a single range score.

We assess the steps required to set up the tracker, install the app and then register the tracker. This includes the clarity of the instruction manual and whether the user interface is intuitive. We also test and score how easy it is to use the app when tracking an item as well as versatility, which refers to the various ways the tracker can be attached to items.

Measured in metres, this is tested in a sporting field with no obstructions. Testing is paused if anyone walks in the line of sight between the phone and tracker, and an assistant stands near the tracker to make sure it isn't stolen or moved.

Speaker loudness is measured in decibels (dB) at a distance of one metre from the tracker but doesn't contribute to the overall score.

Alert duration is recorded in seconds but doesn't contribute to the overall score.

Recommended retail or typical retail price at the time of testing.

An ingress protection (aka IP) rating shows the level of water and dust resistance in the tracker. Generic terms like "waterproof" or "splashproof" can be good indicators, but they're quite broad compared to a specific IP rating.

This will ping your phone if the Bluetooth signal goes out of range or if it detects that you've left it behind.

Some manufactures let the tracker be tracked by the app on multiple devices at the same time. This can be handy if the tracker is attached to something that more than one person uses, such as car keys.

Whether the manufacturer tracks your usage through the app.

This security feature protects your location data where applicable.

Whether the manufacturer shares your location data with third parties.