https://thenextweb.com/gadgets/2018/07/19/huawei-talkband-b5-combines-a-fitness-tracker-with-a-bluetooth-headset/

Huawei’s latest wearable is a bloody strange one. The TalkBand B5 is the fourth-generation of the Chinese giant’s fitness trackers, and like its predecessors, combines a conventional-looking wrist-worn screen with a bluetooth headset.

So, you could be jogging in a park and get a call, and you’d just pop out the TalkBand B5 from its strap, and shove it into your earhole.