Best remote control distance: 3-5 meters The best distance between the remote control car and the laser point is 0-20CM (can not sense beyond the distance) This product is infrared communication, please avoid using it under bright light.Use time of wall-climbing vehicles on the ground: 20-30 minutes Usage time for wall-climbing vehicle on vertical wall or roof: 7-10 minutes Charging time for wall climbing: 30-40 minutes Note: The remote control of this product uses a red laser point formed by a red LED+concave-convex lens, which is not a real laser and does not cause any harm to the human body or eyes.Product parameters:Product name: infrared laser tracking wall climbing vehicle Color: red, blue, green Charging method: Portable USB charging Product material: ABS material and electronic components Remote control size: 14.5*5*13CM Control method: Gun infrared control Guidance method: infrared laser control The wall climber is equipped with a three-speed switch: (OFF) is to turn off the wall climber (FLOOR) is the driving mode on the ground (WALL) is the climbing wall or ceiling mode "all products from us have passed strict quality checks. if there is any quality problem or if you are not satisfied with the product is. contact us . we will give you the best solution."