The Honor Band 4 announced last September may soon get a successor which will be likely called the Band 5, as the company president George Zhao has teased a new fitness band on Chinese social network Weibo.
Zhao has shared a picture of the band which looks similar to the Band 4. You can see that it has a colored display, likely AMOLED, which is accompanied by a circular button.
Like the Band 4, the Band 5 will also monitor your heart rate, but it will also measure your blood oxygen levels and help detect fatigue, listlessness, dizziness, and of course, monitor your sleep.
Original source: https://www.gsmarena.com/honor_band_5_teased-news-37984.php