1、Quality cotton material is beautiful, warm, breathable and comfortable. 2、The heating material is made of composite carbon fiber with high heating efficiency and strength.Carbon fiber materials can radiate infrared while heating, help to promote blood circulation and other health effects. 3、The insole battery adopts the high-capacity quality cell with extremely high safety, which ensures the function of keeping warm and the longest service time. 4、Can cut freely to make it fit your foot size, suitable for most people. 5、After power on, the high level temperature up to 60℃, use time about 3-4 hours. Medium level temperature up to 55℃, use time about 4-5 hours. Low level temperature up to 50℃, use time about 6-7 hours. 2 x Heating Insole1 x Remote Control 1 x Manual 1 x USB Cable  Condition: 100% Brand NewItem Type:  Electric Heated InsoleMaterial: Cotton Operating Instructions: 1. Please fully charge the battery before using this product.When the battery is fully charged, the charger will turn on the red light to indicate that the battery is charging. When the battery is fully charged, the charger will turn on the green light to indicate that the battery is fully charged. 2. After the battery is fully charged, press the H key of the remote control, and the LED of the remote control will flash once. The insoles will light up for 3 seconds, and the insoles will work in the high-grade mode. 3. Press the M key of the remote control, and the LED of the remote control will flash once. The insoles will be on for 3 seconds, and the insoles will work in the middle mode. 4. Press the L key of the remote control, and the LED of the remote control will flash once. The insoles will turn on for 3 seconds, and the insoles will work in the low-grade mode. 5. Press the key of the remote control, the LED of the remote control flashes once, the insole LED goes out, and the insole stops working.If the remote control is accidentally lost, it can be controlled by a switches beside the insole charging interface. 1. Long press the insoles open key for 3 seconds to start the machine, and the insoles will be lit by 3 LED for 3 seconds. The insoles will work in high-grade mode. 2. After starting up the insoles, press the open key again, and the insoles will turn on 2 LED for 3 seconds. The insoles will work in the middle mode. 3. Press the open key again, and the insoles will turn on 1 LED for 3 seconds. The insoles will work in the low-grade mode. 4. Press the open key again, and the insoles work in the high-grade mode repeatedly. 5. Long press the insoles on the button for 3 seconds to shut down, and the LED will turn off and the insoles will stop working.Insoles Length: Approx. 31cm / 12.2inHeating Parameters:After power on, the high level temperature up to 60℃, use time about 3-4 hoursMedium level temperature up to 55℃, use time about 4-5 hoursLow level temperature up to 50℃, use time about 6-7 hoursElectrical Parameters:Insole Battery Voltage: 3.7VInsole Battery Capacity: 1800mAh/pcOperating Voltage Range: 3.0V- 4.2VCharge Cut-Off Voltage: 4.2VDischarge Cut-Off Voltage: 3.0VBattery Life: More than 500 cyclesCharger Parameters:Charging Mode: Constant current and pressure (CC/CV)Charging Temperature: 0℃ ~ 45℃Input: AC/100-230V 40-60HzOutput: DC/ 4.2V 500mAx2Remote Control Battery: 80mAh (non-rechargeable)