Features 1. UPGRADE REMOTE CONTROL HEATED SOCKS: Most heated socks are controlled by a battery pack on the sock itself, but these heated socks comes with a remote controller so you can turn it on or off and change heat settings without having to access your sockparticularly helpful when you're on the move, and your socks are covered by layers or bulky boots. 2. WARM YOUR FEET IMMEDIATELY: Comes with a remote controller, pairing with two 4000mAh 3.7V lithium batteries, these electric heated socks can warm your feet in less than 30 seconds. Simply touch the built-in controller switch or the remote controller to choose from 3 heat settings(high heat: 55, medium heat 45, and low heat 35) any-time anywhere. 3. WASHABLE& PREMIUM: The socks are also thick yet lightweight and flexible. they're also flexible and stretchy, making them an ideal option for a variety of physical activities. You can rely on these heated boot socks to keep your toes comfortable no matter how cold it is. 4. HIGH POWERED HEATED SOCKS: These heated socks include two large-capacity rechargeable Li-lion batteries, which can heat up for long hours. Ideal for any outdoor winter activities and keep you warm all the time. 5. VERSATILE HEATED SOCKS: The heated socks are suitable for all kinds of outdoor sports, such as skiing, snowboarding, hiking, hunting, fishing, cycling, skating, motorcycling, equestrian, etc. Specification Material: Cotton Color: Black, Blue, Grey Package Size: 18 10 5 cm Weight: 350 g Voltage: 5 V Battery capacity: 4000 mAH Battery voltage: 3.7 V Temperature: 35~55 Packing by: Color Box Package Include: 1 Pair x Heated Socks 1 x Battery 1 x Remote Controller