We know that working out which controller you need can be confusing so we put this comparison chart together to make it simpler:
Quick Reference Chart for GSM/SMS Remote Controllers
This is a quick note for Electronics engineers to get to know Quark-elec GSM/WiFi Remote Control products in just one minute.
—QK-G021 Series GSM Remote Controllers
—QK-W015 Series WiFi Remote Controllers
—QK-G025 GSM Remote Controllers(DC Motor Dialer)
Know Quark-elec GSM/WiFi Remote Control in one minute