Many companies do not list the Watts, just Amps.  Why? It could be they don't want the consumer to figure out how much the unit will cost to operate. Here is how to figure out the watts and the cost to operate the unit 24/7 for 1 year.

To figure out Watts from Amps, you must multiply the amps x volts, in the US, that's usually 120 or 240 for heavy duty appliances. For example, 1.2 Amps x 120 Volts is 144 Watts. Next, divide that number by 1000 to figure out Kilowatt hours. 144/1000 is .144. A Kilowatt hour is 1,000 Watts of electricity used for one hour. Next multiply the Kilowatt hours by hours (24 if used all day) then 365 (days in year). Then multiply that figure by whatever your power company charges you for a kilowatt hour.  (Refer to your electric bill) Let's say your power company charges you $.075/kwh.  The cost then to run that 1.2 Amp appliance over one year, not stop would be .144 x 24 x 365 x .075 or $94.60.