I was thinking of using this for work, but I didn't want it to get dirty, so I only did a test run. As a bonus, I'll include a charging adapter, so you can use it right away. I've included pictures, so please take a look. If you have any questions, please comment. Manufacturer: Murakami Hifuku Color: White Material: 100% Polyester Size: L Cool Switch - Cooling Temperature Difference - Continuous Operating Time Strong (Red Light) -20°C Approximately 4 hours Medium (Blue Light) -15°C Approximately 5 hours Weak (Green Light) -10°C Approximately 6 hours Hot Switch - Heating Temperature Difference - Continuous Operating Time Strong (Red Light) +50°C Approximately 6 hours Medium (Blue Light) +45°C Approximately 8 hours Weak (Green Light) +40°C Approximately 10 hours