Just shake it when it's time to get up, and it'll ring.

时间一到，你摇一摇，他就会响的。

youdao

If the cell phone is a certain distance (which is called "guarder distance") from you, the sensor will ring or shake so that you can notice the potential theft or lost.

如果手机远离你一定距离(称之为“保卫距离”)，传感器会响或震动以让你注意到潜在的盗窃或丢失。

youdao

It had been a year since Mayweather had been under the kleig lights and it took him a couple of stanzas to shake off the ring rust.

WSJ: Undefeated Mayweather Returns With Victory