Enhance your remote device management with the GSM-AUTO 4G Remote Controller, a versatile and efficient solution for controlling various electronic devices from anywhere in the world. This product description highlights the key features and benefits that make this remote switch an ideal choice for securing and automating your operations. Global Connectivity: The GSM-AUTO 4G version is a wireless remote switch that connects to a 4G, 3G, or GSM network. Simply insert a SIM card (not included) with a pay-as-you-go plan from your local wireless provider. Once installed, the module has its own unique phone number, enabling global control. Cost-Free Activation: Activate the device by calling its phone number. The unit does not answer calls, so it avoids any charges. Instead, it uses the signal to activate one or two output relays in a pre-programmed sequence, offering a cost-effective solution for remote operation. SMS Control: Each relay can be activated or programmed via SMS text messages, providing control over two independent switches. This allows for versatile applications such as simultaneously powering a battery charger and engine preheater in an aircraft hangar. Secure User Access: The device supports up to 100 authorized users through a secure caller ID system. Users are added to a whitelist, allowing only approved numbers to activate the GSM-AUTO. Manage user access effortlessly by sending SMS commands to add or delete users. Flexible Relay Programming: The GSM-AUTO features two independent relays with normally open and closed