This preconfigured kit comes with everything you need to start testing your freshwater aquarium (excluding app software). The kit can also be used to test your reef aquarium with purchase of all corresponding test strips. Packed in a rugged and durable plastic case with secure fasteners and padded compartments. Compatible with iPhone, iPad, and iPod touch with the minimum iOS system version 9.0 and Android version 4.4 with Bluetooth 4.0. The following comes with the kit: