ESP Dan Jacobs EX - distributed as the ESP LTD DJ-600 - the same model as the guitars in the EX series, with several changes: the headstock is reversed, it uses an EMG 85 pickup in the neck rather than an EMG 60, it has Grover tuners, and it has a Floyd Rose bridge. The tone knob has been replaced by an EMG Afterburner.
A reading of 110 or 120 volts indicates the wall outlet is working properly. If the multimeter has no reading, this is an indication that the wall outlet is not properly connected to an electrical source. Carefully remove the probes Do not touch the metal parts of the probes as you remove them.
Volts are units to measure voltage and watts to measure power, hence the question is not answerable in the current form. When you use electricity from a 220VAC socket outlet, the power in watts that you consume depends on the amount of current that flows from the socket in addition to the voltage level of 220VAC.