Hello Friends: This electricity warmer&cooler is a gift from my GF, for me so that I can play computer game more comfortable, but I didn't use it. this one has 2 channels, one for warmer and one for cooler, very useful, you may put it on table or just put it on the floor, the strong wind is really nice, now I'm intending to leave beijing, so anyone need it, feel free to contact me. I live near Li Shui Qiao but work near An Li Road