VentureHeat Avert Unisex-Adult 7.4V Battery Heated Glove Liner (Black, Small) Up to 5 hours of additional heated comfort with two of 7.4V rechargeable lithium-ion battery Softshell fabric keeps your hands warm and dry during those cold days The hair-thin, micro-carbon fiber heating elements stretches from each finger and thumb to the wrist for a full-hand heated comfort One-button touch controller gives you three heated settings to choose from: high heat, medium heat, and low heat Touchscreen friendly on index finger and thumb