Yajisi 4-Channel 4G GSM Remote Relay Switch with Temperature/Humidity Sensors, Power‑Loss Alarm, APP/Web/SMS Control

Elevate your home or office automation with the Yajisi 4G 4‑Channel GSM Remote Control Relay Switch (SM4‑WLTE‑EC). This robust, aluminum‑cased controller delivers four independent relay outputs—each capable of 10A or 15A—so you can manage lights, HVAC, or any 100‑240V appliance with precision. Its dual temperature and humidity sensor ports allow real‑time environmental monitoring, while the built‑in power‑loss detection and power‑outage alarm keep you informed via SMS, APP, or web notifications. The device supports standard SIM cards and covers a wide range of 4G/GSM frequencies, ensuring reliable connectivity wherever you are. With a sleek, durable design and intuitive remote control, this relay switch is the perfect solution for smart home integration, industrial automation, or any scenario that demands dependable, remote power management and environmental awareness.

• Four independent relay channels support 10A or 15A output, enabling versatile control of appliances while maintaining safe operation.
• Built‑in power‑loss detection triggers instant alerts and can automatically shut down connected devices to protect equipment during outages.
• Dual temperature and humidity sensor ports allow real‑time environmental monitoring, ideal for climate‑sensitive storage or greenhouses.
• Remote management via 4G, GSM, or web app lets users adjust settings, view logs, and receive SMS notifications from anywhere.
• Sturdy aluminum housing delivers long‑term durability and resistance to vibration, ensuring reliable performance in industrial settings.