The BT Interface is an external docking station to sends data to your smartphone or computer through a USB connection. It is compatible with both Android (OS Version 7.0 onwards) and iOS (OS version 10 onwards), as well as the PC (Windows 7 onwards) and Mac (Yosemite onwards). The docking station is equipped with a CR 2032 battery included and replaceable by the user, which allows the user not to consume the internal battery of the dive computer. The specific app is available on both the Google Play Store and Apple App Store. This Interface BT is compatible with the following Cressi dive computers: Cartesio, Goa, Neon, Nepto, and King.