Complex sentence: The amplitude of the signal can range from 10 to 600 Volts with a current of up to 1 Ampere, according to the surroundings, for example different conductances of salt and fresh water.
Split into simpler sentences: The amplitude of the signal can range from 10 to 600 Volts with a current of up to 1 Ampere. This is because of the different conductances of salt and fresh water.