Enhance your smart home or industrial control system with the Sonoff 4CH Pro R3, a versatile 4-channel universal WiFi wireless smart switch designed for seamless remote and automated control of your electrical devices. Compatible with the free eWeLink app for both iOS and Android, this smart switch enables you to turn on or off up to four appliances independently from anywhere, providing ultimate convenience and flexibility. Key Features: · App Support & Real-Time Sync: Effortlessly control and monitor your devices with the free eWeLink mobile app, which provides real-time device status updates for enhanced management. · Remote ON/OFF Control: Remotely switch four electrical devices on or off independently, allowing you to manage your home or workspace with ease. · 433MHz RF Remote Compatibility: Supports control via an optional 433MHz RF Remote Controller, adding an extra layer of convenience for indoor remote operation. · Multiple Working Modes: Easily switch among inching, interlock, and self-locking modes to customize device behavior according to your needs. · Advanced Timing Functions: Schedule up to eight enabled countdown, single, or repeat timing tasks to automate your devices at specified times, improving energy efficiency and convenience. · DIN Rail Mounted Design: Compact and robust, ideal for professional industrial control applications and easy integration into electrical panels. · Voice Control Integration: Fully compatible with Amazon Alexa, Google Home, and Nest, enabling hands-free voice commands for a smarter living environment. · Share Control Capability: Share device control with family members to collaboratively manage your smart home system. Specifications: · Power Supply: 90V~250V AC · Max Current: 10A per gang, 16A total · Max Power: 2200W per gang, 3500W total · Operating Temperature: 0ºC to 40ºC (recommended) · Operating Humidity: 5% to 90% RH, non-condensing · Transmission Mode: Wi-Fi 2.4GHz communication · Wireless Standard: 802.11 b/g/n & 433MHz RF · Security Mechanism: WPA-PSK/WPA2-PSK encryption · Enclosure Material: Fire-retardant ABS V0 · Number of Gangs: 4 · Product Dimensions: 145 x 90 x 34 mm Package Includes: · 1 x 4-Channel WiFi Smart Switch · 1 x User Manual Note: For remote control via RF Remote Controller indoors, a separate 433MHz RF remote controller must be purchased. The Sonoff 4CH Pro R3 smart switch combines reliable wireless connectivity with flexible control options, making it an essential component for smart homes and industrial automation. Its robust construction, multiple working modes, and comprehensive app and voice control support ensure an intelligent, efficient, and convenient device management experience.