USB or Battery Powered Wall Mountable Digital LED Light Up Clock with Adjustable Time Letter Based Display Read the Time Top to Bottom in Words with the Clock Automatically Switching the Display Every Five Minutes The Clock is Powered Either by the Included USB Cable or by Batteries and Can be Free Standing or Wall Mounted A Great Gift for Gadget Lovers, People Interested in Quirky Clocks or Those Who Have a Problem Telling the Time Measures Around 20 cm by 20 cm by 3.5 cm | Requires 3 x AA Batteries (Not Included) or 5V/1A USB Power Source