sure, that will do. you just have to check out 4 things:

1st: see if the voltage is applicable to your area (if its 110 or 220v), otherwise you might ruin the power supply (in your case it is, so nevermind)
2- the polarity. if its boss polarity, then its ok (cause the manual says so, and because thats the default for pedals nowadays)
3- the dc voltage: if the dc voltage is higher than your pedal’s (ehx says here the crying tone is 9v, so its ok) youll fry it; if its lower its not going to work (but i think nothing will be destroyed)
4- the mA (amperes): the amperes would be like the “strength” of the current (its actually the quantity of electrons that pass by), if you dont have enough spare mA from the supply, the pedal is not gonna work. your pedal will work because yr power sup can deliver 500 mA, and the pedal only takes 11 mA, so you can even power more pedals if you want to (though this might bring noise issues)

summing up, this power supply is fine (provided it works like advertised)

one question though (BobZombie, dont worry, you can go play with the pedal): the manual says it requires a 9 “A”C adapter, instead of DC, but right afterwards it recommends a 9 “D”C adapter, DC instead of AC. why? is there somthing im missing? though im sure theres no problem, only if the current was AC and not DC, right? (which is the opposite case of BobZombie’s)