Package includes - 2 pieces of heated insoles, 2 pieces of battery box, 1 piece of USB, 2 pieces of gaiter, 1 piece of user manual. The heated shoe insoles are evenly heated, low voltage, safe and energy-saving, fast heating, soft and comfortable. Heated Insole - Made of special EVA foam, it is comfortable and thin, lightweight, flexible and has good cushioning properties. Exquisite workmanship provides a soft and comfortable touch, keeping feet warm in cold weather. Multi-purpose - USB is suitable for home and office use, etc., Battery is suitable for outdoor sports, etc. Battery box: 3-section 5 DC35 battery box (NO BATTERY). Perfect for keeping your feet warm in winter. The standard output of the heated insoles is 4.5V. The heater may not start if the home charger or power bank does not reach 2A. Safe and Reliable - This heated insole is low voltage, safe and energy-saving, and it can keep your feet warm in winter. The standard power of the heated insole is 5V 2A. The adjustable