<p>Product material: Polyester\/nylonPacking list: pair of gloves, 2 PCS DC battery box, no battery insideHot area: back of the five-fingered handFever temperature: about 50 - 60 degrees at normal temperatureProduct size: average sizePower supply of the product: power supply by 4.5vdc battery box. Please choose No. 5 alkaline battery powered or No. 5 rechargeable battery (1.5V, capacity over 1500mAh) powered, the battery box is 3 No. 5 battery box. Ordinary carbon batteries or smaller capacity rechargeable batteries cannot be powered and do not heat up. The heating time depends on the capacity of the battery used, the larger the capacity, the longer the time. The foot capacity 1500mAh rechargeable battery can be used for about 2 hours after fully charged. Glove washing: surface brushing or machine washing after putting in a laundry bag. Product weight: about 240g Packing method :OPP bagPacking size: about 31*14*5cm</p> <p>Note: The data is all manual measurement, please allow 1 - 9cm error, due to the difference of light and display, there will be a certain color difference, depending on the physical object received.</p>