GSM Switch SMS Controller 4 Relays CL4-GSM — Garage Door & Home Electrical Control with Temperature Sensor and Power-Failure Alert (CL4-GSM-N / CL4GSMNC)

Overview: 4-relay GSM SMS controller designed for remote switching of garage doors and household electrical devices. Operates via SMS for control and alerting functions. Model differences: - CL4-GSM-N: Compatible with a temperature sensor. Does NOT support a temperature&humidity sensor and does NOT include the Power Failure SMS Alert function. - CL4GSMNC: Compatible with a temperature sensor and a temperature&humidity sensor, and includes the Power Failure SMS Alert function. Package List: - GSM Switch SMS Controller x 1