Connect the USB connection cord to your power bank or USB power supply. Heater will not be activated with 5V/1.0A power supply. If you have a mobile battery with 2 USB ports, please make sure to only connect this product. If you use 2 ports at the same time, the current may not be sufficient and will not work. Press the switch continuously to adjust the temperature. (104°F (40°C), 104°F (45°C), 122°F (50°C)) (The temperature of the heater itself, may differ from the core temperature. )
We cannot accept returns except for incorrect delivery, initial defective or defective products attributed to our liability. Please make sure you place your order with great consideration when making your purchase. (We cannot accept returns due to customers preferences after purchasing the product. )