Coollang Smart Badminton Sensor
Coollang Smart Tennis Sensor
How to connect  Xiaoyu2.0?
Xiaoyu2.0 app introduction
How to connect  Xiaoyu2.0 to mobile phone?
How to train using  Xiaoyu2.0?
Motion
How to turn off  Xiaoyu2.0?
How to install Coollang tennis sensor?
Coollang Tennis Sensor Introduction
How to connect Coollang tennis sensor to mobile phone? 
How to train using smart tennis app? 
Statistics
How to turn off  smart tennis sensor?