Estate Swing GSM 3G Unlimited Range Cell Phone Receiver Open your gate from your cell phone (or from house phone wireless), programs 99 cell or landline num Unlimited Range: Operate your gate from another country as long as there is an operational cell towe Compatible with GTO, Mighty Mule, Estate Swing, Zareba, Liftmaster and Apollo Operates on a SIM card and separate cell phone number Only compatible with AT&T and T-Mobile cellular devices