<br><b>Specification:</b> <br>Rechargeable Battery Heated Socks Kit for Chronically Cold Feet for Women and Men Features: <br>Colour: Blue/ Pink/black <br>Voltage: 3.7 V <br>Fabric: Cotton&spandex <br>Heated Area: Front instep <br>Battery: two 3.7V rechargeable li-ion batteries <br>Heat Settings: 3 Levels Temperature Settings- High (Red), medium (Orange) and Low (Green). <br> <br><b>Include Package:</b> <br>1x (1) pair of socks <br>2x 3.7V li-ion batteries <br>1x AC charger <br> <br><b>Electric Socks - customer Q&A</b> <br>Q: How long will the electric socks last for heating? <br> A:6 hours is no problem at all (as if the outdoor temperature is biased). <br> <br> Q: what's the temperature of the electric socks? <br>A:Because the environment is different, we are aiming at a unified test environment, <br>which is about 50 degrees Celsius, and the temperature of socks is about 1 minutes or so at <br>24 degrees Celsius. <br> <br> Q: Do you feel hot as soon as you put the socks on ?! How long does the electric socks take <br>to become warm? <br>A: Just put on socks, socks and body temperature are relatively low,that is to say, you will <br>not feel hot as soon as you put on the socks. Under normal conditions, half a minute is just <br>fine for a large amount of heat absorption. <br> <br> Q: how can I wash it? How long will it take? <br>A: Hand washing is fine. Be sure to put on the battery bag before you wash it. In theory, the <br>heat line is longer than the socks, which means that when the socks are worn out, there is <br>no problem with the electric line.when washing, pay attention to the battery bag first and <br>then wash it, for fear that the battery pocket will stick to the sock.