Durable construction and plenty of heat output Five levels of temperature adjustment Set includes connecting wire with heater switch and handlebar bracket Made of special rubber material that is resistant to outdoor conditions and elevated temperatures Thin and flexible silicone wires make them easy to install Provides ôshort circuit protectionö and ôlow voltage protectionö technologies Internal memory that allows the grips to stay at previous warmth level. HEAT GRIP-5 LVL HTD THUMB