The built-in wireless charger allows you to charge any Qi-enabled device by placing it on top of the Alarm Clock.In addition to displaying the time, this unit will also show the date, indoor temperature, and has 3 alarm settings. The voice activation feature will turn on the LED display(time and temperature) when you make a noise (like a clap)or by touching the Alarm Clock. Note this is a power saving mode that can be turned off if you prefer the LED display to show all the time.