It's 2019.
Huawei Wristband 4 is a smart wristband product released by Huawei in Shenzhen, China, on October 23, 2019.
Huawei Bracelet 4 adds the function of blood oxygen detection and USB direct charging, the overall weight of 24g; Huawei Bracelet 4 has three colors, respectively obsidian black, red tea orange, cherry talk powder.