Huawei Technologies Co Ltd, the Shenzhen-based electronics giant, is kicking off global sales of its flagship wearable on Wednesday at an industry expo in Berlin, a full six months after the device's debut.

The long-awaited move, however, means the Chinese company is already well behind its much-vaunted rival the Apple Watch - the not-so-perfect gadget which experts still suggest has a strong lead in the sector.

The Huawei Watch, running on Google Inc's tailored operating system for wearable devices known as Google Wear, is believed to carry a price tag of over $350.