Introducing the Sonoff 4-Channel WiFi Smart Switch Pro - the ultimate solution for your smart home needs. This advanced model boasts several upgrades from the standard version, making it the perfect choice for those seeking a more comprehensive and versatile smart switch.

Firstly, the Sonoff 4-Channel WiFi Smart Switch Pro is slightly larger and heavier than its predecessor, measuring at 145*90*40mm and weighing 350g. This added weight and size is due to the additional features and capabilities that the Pro model offers.

One of the most significant upgrades is the voltage compatibility. The Sonoff 4-Channel WiFi Smart Switch Pro can handle both 90-250V AC (50/60HZ) and 5-24V DC, making it more versatile and compatible with a wider range of devices. Additionally, the Pro model has a higher wireless standard of 802.11 b/g/n 2.4GHZ and RF 433.92MHZ, ensuring a more stable and reliable connection.

The Sonoff 4-Channel WiFi Smart Switch Pro also offers enhanced security features, with WPA-PSK/WPA2-PSK encryption to protect your home network. It also has the added convenience of being compatible with 433MHz RF remote control, allowing you to control your devices from a distance.

Other notable features of the Sonoff 4-Channel WiFi Smart Switch Pro include tidsstyret timer/nedtælling, 4 gang channels, interlock/self-locking/inching modes, and DIN Rail compatibility. These features make the Pro model a highly versatile and comprehensive smart switch, perfect for any smart home setup.

Upgrade your home automation system with the Sonoff 4-Channel WiFi Smart Switch Pro today and experience the ultimate in smart home convenience and control.