⦾ 3" Round 3D-printed sign with LED backglow. Simply plug in the supplied 5.5' 5V usb power cable into any usb wall adapter (not included) and switch the sign on or off with the included push button witch. Let your family, friends, or co-workers know when you are busy or on a call to prevent meeting interruptions. ⦾ These new signs have a built-in backing for maximum visibly. Perfect for crowded offices. ⦾ DITTO3D offers a wide variety of LED wall signs, so check out the shop! Custom...