Static, Emf, Proximity can spell out words
 
The Oracle is a device that uses multiple sensors to sense different energies to allow communication by spelling out words.  It also has numbers as well.  The device, when turned on, will tell you the input power level, then tries to detect energies from Static, Emf, Proximity sensors around the device.  If the energy is natural or too high for a constant detection, the device will automatically lower the sensitivity so it can operate normal.  The light bulbs acts as an antenna and does not function as lights.  The device when acting as a communication device, and when it detects energy, will display the letter, and it will try to tell you the letter. When the light in front or the oracle sign is lit, the device is searching for the energy.  When the device cannot properly calibrate then it will tell you good bye and will sit idle until powered off.