Workman's best-ever cooling/heating effect with a Peltier element, down to -28°C in as little as 1 second. Heating up to 39°C also in as little as 1 second. I actually tried it on and experienced it myself, and it's truly amazing. The wiring and setup are all complete, so I'd like to hand it over to you ready to store in the box. The battery has also been charged once and confirmed to be working. First come, first served.