Stair Climbing Hand Truck: The main use of high-rise building stair products up and down stairs, One person can operate; A unique track str it is powered by a removable 24V lithium battery and has a battery life of 3-4 hours; low energy consumption and fast charging. Is your good partner for moving work. 441LBS Heavy Load: The stair climbing truck provides a large storage space of 27.6"L x 21.7" W x 69.7"H that can accommodate more goods, and the maximum load-bearing load of 441 pounds can transport heavy goods such as refrigerators, TVs, and air conditioners. It comes with a 49.3" seat belt can help you fix the goods to prevent falling down. Easy to Operate: The functions of the heavy-duty hand truck control panel are clear at a glance. Turn on the power and press the up or down button to easily control the moving stairs. When the battery is dead, you can rotate it to the left (counterclockwise) to remove the battery from the cart. After it is fully charged, rotate it to the right (clockwise) to put the battery back on the cart.