1.What is material this product made of ? --------It is die-cast aluminum housing ,gear is copper ,stainless telescopic rod ,the motor wires is copper . 2.Can it be used outside ? -------- Yes , our dual swing gate opener could be used inside and outside of gate 3.What is the frequncy of your remote control ? -------- It is 433Hz . 4.What is the longest time for opening and closing the gates ? -------- It is about 12s. It could be set up depending on your demand . 5.What's you warranty? -------- 1 year time warranty.