<br><b>3.7V Heated Socks</b> <br> <br>Voltage:3.7V <br>Material:Cotton Polyester Spandex <br>Heated Area:Front Instep <br> <br><b>Package Included:</b> <br> <br>1*pair of socks <br>1*AC charger <br>2*Li-ion Batteries <br>1*Using Manual <br> <br><b>3 Levels Temperature Setting:</b> <br> <br>Red Light:100% Heat <br>Orange Light:75% Heat <br>Green Light:50% Heat. <br> <br><b>Temperature Switch and Lasting Hours:</b> <br> <br>Red：3-3.5 Hours <br>Orange:4.5-5 Hours <br>Green:6-6.5 Hour <br><b> <br>Note:</b> <br> <br>Hand Wash,Soft Wash. <br> <br>The 3.7V Batteries May Not Come Full or It is Out of Power,It Need <br>to Be Fully Cahrged Before Using. <br> <br>It Need to Charge the Batteries about 12 Hours to activate for the <br>first time,Then 5 Hours Each Time. <br> <br>Please Charged the both batteries at the same Time.If the batteies <br>are fully charged,the charger light turns red to green,not the battery <br>light.