4.2W / 
- revised hashrate has not been published. Assumed to be around .5-.7 GH.
Can you please provide a link? OP has been updated. - revised hashrate has not been published. Assumed to be around .5-.7 GH.power spec is given as J/GH not W/GH/s. The reason is that chip GH/s performance is rather irrelevant due to minimal hardware costs.
Looked over the source again. Seems to have been updated to 4.2J/GH. Should clear that up.