The GBA-800-9AER [like the entire GBA-800 series] is definitely launching a new sports era for the shockproof G-Shock division. From the point of view of functionality, everything is not all smooth: noticed the discrepancy in calories, the accuracy of the pedometer though very similar to the real, still not as convenient as GPS trekking [but just less voracious]. During the research of new items, the phone informed about new updates in the clock itself – this can not but rejoice. The Japanese are improving the GBA-800, which means that we will see many new settings, improved accuracy in measurements, etc. It is a pity that there is no solar power, but this is also a matter of time. If your favorite sport requires just programming some interval periods – the GBA-800 is just the perfect choice.