Huawei Chief Executive Richard Yu presents the Huawei Talkband B2 during a news conference in Barcelona March 1, 2015. [Photo/CFP]

No 4: Huawei Talk Band 2

Smartphone and telecommunications giant Huawei produces a number of wearable devices, of which the Talk Band 2 (US$64-142) is by far the most popular. Compatible with both iOS and Android, it supports a number of apps including fitness trackers, social networking, and a camera.