Eufy SmartTrack Card E40 drops to $24.99 on Amazon

The deal represents a 29% discount from the RRP and is the best price the publication has tracked since the device launched earlier in the summer. The E40 is designed for people who find round trackers too bulky for wallets or card holders.

The card-shaped tracker can be slipped into a wallet, passport, bag, or luggage. It connects to Apple's Find My and Google's Find Hub networks, allowing users with mixed phones and tablets to locate their belongings through the large tracking systems.

Eufy says the tracker has a water-resistant and bend-resistant design for everyday carry. It supports wireless charging and provides up to about five months of use per charge. A built-in loud alarm helps with nearby searches, and QR-code recovery features allow a person who finds the lost item to contact the owner.

Android Authority described the device as a “very easy pick” for anyone wanting a flatter tracker without giving up broad tracking support.