• Remotely control connected lights or devices through the app, up to 4 independent channels.
• Compared to the 4CHR3 model, this pro version has dry contact or voltage-free contact mode, relay available. In addition. has a higher amperage capacity up to 40A.
• It has 3 working modes with self-locking, interlocking, and inching mode even for remote controlled garage doors and roller shutters.
• Supports scheduling a timer to make devices automatically start and stop working.
• Customize smart scenes to let the device connect with the switch to trigger other devices.
• Share the control permission of devices with other accounts to control together.
• Create smart scenes so that one SONOFF device can turn on or off another, or group multiple devices into a single group and start them all at once with a single tap.

It is compatible with Amazon Alexa (Amazon Echo/Echo Dot/Amazon Tap) and Google Home Assistant. Allows you to use your voice to control home appliances and enjoy a hands-free experience.

1. Please turn off the power before installing the device.

2. The router must be 2.4GHz (Wi-Fi 5.0GHz is not supported), but there is no limitation on the smartphone network (2G/3G/4G/Wi-Fi networks are accepted).

TÜV, CE and FCC certifications ensure a safer and more reliable product.