Nail Dryer of Natura´s store.
Price: € 4,90 (in Canary Island)
Batteries: You must to use 2 AA batteries
My opinion: It's a little noise (like dryers trip about), the air produced by the device is cold, but it has a tiny size so it is easy to store. You are reduced to almost half the drying time of the nails.
Other web sites where I found a similar item:
Buyincoins to $6.25.
Dealextreme: Here I found a pink to $ 10.11 and white two models of nail dryer, model 1 to $9.99 and model 2 to $10.33.