after reading their The Google Wallet Mobile ATM carefully i must say its a joke.
There is no way you can have an attachment for your phone which will print crisp bills LOL
Read the whole write up
"Tired of digging in your pocket to find crumpled, ripped one dollar bills? Wish that crisp $1, $2, and $50 bills were available on demand? Take a look at our Google Wallet Mobile ATM.
The Mobile ATM device easily attaches to most smartphones and dispenses money instantly and effortlessly– forever ending your search for the nearest bank or convenience store. Just type in your personal pin code on your cell phone and access all your cash from the palm of your hand. Learn more here:
http://goo.gl/FNVoR"
Lol