Guoguo heated socks is comfortable and durable for Men and Women, keeping your feet warm in cold weather. It\'s batteries are made of high-quality materials, have a long service life, and can be heated for a long time on a single charge. it\'s suitable for winter outdoor activities and creation.\r\n \r\nBatteries: 7.4V-2600mah\r\n \r\nPower: 20W (max)\r\n \r\nInput: DC8.4V-1000mah\r\n \r\nOutput : 7.4V 1A\r\n \r\nPackage Included: 2 x socks, 2 x rechargeable Batteries, 1 x User Manual\r\n \r\nWarning tips:\r\n \r\n1.After you received the heated socks,please charge it for at least 4 hours.\r\n \r\n2.Don\'t recommend you use machine wash, machine wash will damage the inside heated element. Spot clean socks by hand using only mild detergent.\r\n \r\n3.To make it work more efficient, click the highest setting let it work for about 15-20 minutes and immediately switch to lowest setting to save more battery life.\r\n \r\n4.When the battery is fully charged and left for a long time, it will automatically discharge, please recharge it before you use.\r\n \r\nCautions: Keep batteries away from children. Do not open, modify, disassemble the battery pack. Do not expose the product to rain or water.