Description:  Easy to use.  Wide application.  Water-proof.  Energy efficient.     Specification:  Battery Voltage: 3.7V Li-ion Battery;  Battery Capacity: 2000mAh;  Charge time: about 4 hours;  Keep Warming Time: 3-4 Hours;  Heating Materials: Flexible Nano fiber heat material;  Heating constant temperature: 45 degree;  Charing: The light in charger is red;  Full charger: The light in charger turn into green from red.     Note:  1.The gloves 45degree Celsius is measured under conditions of the lab incubation at room temperature of 20degree Celsius. The gloves using time deviation within 10% is belong to the normal phenomenon (the using time is accociated with many factors, not depends on the single factor).  2. Please allow 1-3mm errors due to manual measurement.  3. Due to the difference between different monitors, the pictures may not reflect the actual color of the item.     Package Included:  1 X Pair of Rechargeable Heated Gloves;  2 X Li-ion Batteries;  1 X Charging cable;  1 X Charger.