This device comprehensively records not just steps, but also various daily activity levels. It is not a GPS tracker. It connects to your smartphone via Bluetooth and is managed through an app. Please refer to the distributor's website for detailed features. https://petble.jp/smart-tag It appears to be discontinued and is no longer available new. It was used for about 6 months for a small dog's health management and then stored for about 3 years. The charging lamp lights up, but since the app has already been deleted, various confirmations have not been made, so please consider it as semi-junk. Contents: ・Tag body ・Rubber holder to secure the tag to a collar, etc. ・Charging dock ・Charging cable ・Quick manual Tag body size: 47 x 24 x 12mm, 10g