Thin, stretchy design and an extended gauntlet are meant to be worn under other gloves for added warmth. Powered by Gerbing's patented microwire heating elements, these comfortable heated glove liners are designed to connect directly to Gerbing jacket liners or powered directly by your motorcycle battery. Connects to your motorcycle's electrical power. Microwire™ heating elements deliver evenly distributed heat. Moisture-wicking Fabric and special long gauntlet intended to fit under other gloves. Hand-washable anti-bacterial-treated material. Versatile and weatherproof. 12 V Heated Glove Liners incorporate advanced battery-powered heating elements that provide even and consistent warmth to your hands and these elements are strategically placed across the fingers and the back of the hand, ensuring thorough coverage and comfort. Designed to be used with Gerbing's 12 V heated jacket, a Gerbing 12 V battery, or connected directly to your motorcycle or ATV and this compatibility allows for easy integration and synchronization, enabling you to control the heat levels of both the glove liners and jacket liners simultaneously with a controller. Winter hand warmer can be connected to a controller, allowing you to customize the warmth level based on your preferences and the weather conditions. A controller provides convenient access to varying levels of heat. Constructed with soft and moisture-wicking stretch lycra, ensuring durability and long-lasting performance and designed to be thin and lightweight. Lifetime warranty on the heating elements. Max Heat: 135°F @ 13 W Each. Power: 12 V DC 1.0 A Each. We recommend the use of a temperature controller with this product. Failure to do so may cause discomfort and burns..