I put these grips on my bike last year and have been in love with them ever since. Cold weather, Rain or Light Snow with 6 heat adjustments for temp control you'll always have one that works for your conditions. Originally when I installed I was Leary about wiring them direct to the battery and not going through the key switch and how the sensor worked? Now after using for awhile it turns them off after 20 min or the battery level drops down to about 12.3 volts. The nice part about this is on short stops is when you get back on your bike the grips are still hot.
They are a little pricey till you feel how they work, then there worth every penny