Can be use at Zenfone 2.
By double tapping the screen, you can
1. Wake up the phone: When the phone is in sleep mode, tap the screen twice to wake up the phone.
2. Lock screen: When the phone is on the page of desktop, tap the screen twice to lock the screen.
How to enable / disable this function
Please go to "Settings" -> "ZenMotion" -> "Screen on / off".
