1、[Convenient Remote Control] The GSM gate opener supports free call remote control, SMS control, APP control. Simply make free phone calls through your mobile phone to remotely access the gate or garage door. Unknown callers will be ignored for enhanced security. 2、[User Friendly Access Management] Supports adding 1001 authorized users on for callny control APP and one key query of all users for efficient management. 3、[Flexible Operation] This GSM gate controller supports 0 to 9999 second delay closure, continuous relay without time restrictions, and remote restart and reset with unlimited distance access, allowing for convenient and versatile operations. 4、[Sturdy and Compact] Featuring an ABS shell with excellent insulation, this GSM remote switch is ideal for industrial control applications. Its small size and support for wall mounting make installation easy and space saving. 5、[Versatile Applications] Suitable for gates, bollards, guardrails, garage doors, shutters, parking systems, maintenance doors, and machinery, the GSM door opener offers a wide range of applications in various settings.