The installation was really simple with the instructions, if you have a basic knowledge of electrics. It can be set as long as the controller is electricity to the motor. Does the gate for example 30 seconds, until it is open, you can set 45 seconds. This ensures that even if the gate running times heavier than normal (winter) it travels to the limit of the engine. After the interval the motor is provided without current. The remote control function reliably, but act according to the price cheap.
Can be connected is also an additional button. I have used a normal shutter switch. This has two keys, which can not be actuated simultaneously, since the push button locks it. The control needs in each direction (high or below) a button. Some controllers have only one button, the first button press is high and the next down. The gate can stop in any position.
How long will the batteries of the remote controls keep, how much is the quiescent current consumption of the controls and how stable control against lightning strikes in the vicinity, I can not say. But at the price I am willing to take the risk. In addition, a German contact (with telephone number) stated that one can contact if you have problems. The provider so afraid not to be contacted for questions.
-> My Rating 5 star, because a very low price for good quality. Because of the low price I expect no perfect hand-held transmitter and give the product so that no deduction.