1. Please charge the two batteries fully before the first use. 2. Connect the li-ion battery with the wire which located in the sock's inner pocket. 3. Press the button on battery for 3 seconds until the Red (high/Ⅰlevel) light. Press it again to switch the other heating modes, Orange (medium/ Ⅱlevel), Green (low/Ⅲ level). 4. Long press the button for 3seconds at any mode, it will be turned off.
High/ⅠLevel: 140℉/60℃, 5 working hours
Medium/ⅡLevel: 130℉/54℃, 7 working hours
Low/Ⅲ Level: 110℉/43℃, 10 working hours
1 x Pair Sailwind Heated Socks
2 x 3.7V 2500mAh Rechargeable Li-ion Batteries
1 x Micro USB Charge Cable
1 x User Manual