An operating device for testing torque wrenches is formed with a carrier for fixing a torque wrench to be tested. Electrical equipment provided behind the head pipe and ahead of the engine can be partly exposed by a gap between a down frame and a radiator of the vehicle, enabling the electrical equipment to be cooled by airflow. The latch is slidingly operable on the contact surface of the base between a locked and an unlocked position. Also, the nested container sends its own information identification information and layer information responsive to received interrogation signals. The second electrode structure of the second light-emitting diode unit is flipped over and electrically connected with the adjacent first electrode structure of the first light-emitting diode unit.