GSM Door Opener, Remote Automatic Relay Switch, Free Call Access Controller RTU5034 Support 850/900/1800/1900MHz

Description

🔐 Unlock the future of remote access—anywhere, anytime, effortlessly!

The Hopcd GSM Door Opener is a cutting-edge remote relay switch that leverages quad-band GSM technology (850/900/1800/1900 MHz) to provide global, distance-free access control. It supports up to 200 user groups with customizable time windows, operates on a wide 9-24V DC power range with anti-reverse protection, and enables free-call activation without incurring call charges. Ideal for residential, industrial, agricultural, and business applications, it offers real-time SMS status updates and simple user management via SMS commands, making it the ultimate smart access solution for the modern professional.