Gerbing's electric gloves are great. Nice leather, long cuff. They connect to the battery. Properly installed, the wire leads are not obtrusive. The warmth is fantastic. I can tolerate temperatures in the 30s with these gloves. Since the alternator puts out around 14 volts, using wires (rather than portable 12 volt batteries in the glove cuffs) gives more power. Power goes as the square of voltage, so the gloves deliver about 36% more heat at 14 V than at 12 V. The only downside is the purchase price. For me, there is no need to modulate the heat with a controller; I like them full-on. I installed a switch on the side of the motorcycle, so I can turn the gloves off if my hands are roasting.