Zepp, a manufacturer of sports tracking wearables, secured $15 million of Series B financing from GGV Capital, Legend Capital, Bertelsmann and Cherubic Ventures. The company previously booked $5 million of Series A financing from Legend Capital. The company’s flagship product is a 6.3g square wearable sensor powered by 3D motion technologies. The data thus collected can be transferred to either Android or iOS-enabled smartphones or tablet immediately via Bluetooth. The product is currently on sale for $149.99, but only in packages composed of a sensor, rackets, gloves, and a charger.