Panxris Ileft the red wire free , it is not required that you connect it with the positive backward lamp socket. I do not know what will happen if you do though. Some cams have a reverse mode and thats where it is useful

Panxris Car electric system is 12 volts, you need 5 volts to supply to the device. So you need a power bank or a transformer device with 5 volts output

Panxris Absolutely

Panxris Inormally wear a Medium size.I ordered and XL size of this vest ant was perfect.Go 3 sizes above the normal

Panxris Probablynot

Panxris It actually warms the front pockets, the upper back, and mostly the neck collar. The heating element is built in you cannot add or remove any

Panxris Yes and it is of very high quality the sound on the other side of the call is clear even in noisy environments.

Panxris No, too little air flow