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This is a smart watch. What is special is its crown. The crown can be pulled out. At the same time, it can be clicked and rotated. It can be used as earphone (similar to the bluetooth headset) when the crown is pulled out. As the crown rotates, click can achieve different functions under different situations. For instance, when you talk to others on the phone, rotation can adjust the call volume and click can put through and hang up the phone. When you listen to the music, rotation can adjust volume and click can switch to the next songs or pause songs.
SHAANXI UNIVERSITY OF TECHNOLOGY