... on the controller, lock arm down, let it in, when left, press the upper key, raise the lock arm, locking the parking space ... .2. Locking height: 410mm, unlocking height: 85mm;3. Dimension ... .: 10kg;G.W :10.5kg yellow carton5. Packing Size (1 set):498×498×145mm Automatic Series Solar Car Parking lot Barrier