Power consumption for SURFboard SBG10?

I don’t have one but all the replacement power supplies I looked up were 12v 2ah supplies. IF you’ve got one, you can check the output on the power supply to see what its actual ratings are.  Most devices don’t actually use the max of their supply so there’s some head room. So it should be 12-24 watt. for that size supply.  

For the SBG10, the power requirements are as follows: 12V DC, 1.5A, PIN type: POS (+), and the adapter type is a wall‑wart.