The best remote control distance: 3-5 meters The best distance between the remote control car and the laser point is 0-20 CM (may not be sensed beyond the distance) This product is infrared communication, please avoid using it under strong light. Use time of wall-climbing vehicle on the ground: 20-30 minutes Use time of wall-climbing vehicle on vertical wall or ceiling: 7-10 minutes Wall climbing car charging time: 30-40 minutes Note: The remote control of this product uses a red laser spot formed by a red LEDandconcave-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: USB portable charging Product material: ABS material and electronic components Remote control size: 14.5x5x13CM Control method: Pistol infrared control Guidance method: infrared laser guidance The wall climber is equipped with a three-gear switch: (OFF) is to close the wall climber (FLOOR) is the ground driving mode (WALL) is the climbing wall or ceiling mode "all Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product are. contact Us. we Will Give You The Best Solution."