You can also control it with the 433 MHz remote control when no smartphone network is available. The smart 3-channel switch can independently control three lamps. By setting timers or schedules in the eWeLink app, a lamp can be automatically turned on or off at a specific time. You can create smart scenarios so that one SONOFF device turns another on or off, or group multiple devices together that can be controlled with a single tap. The SONOFF T1EU3C Wi-Fi switch is compatible with Amazon Alexa and Google Home Assistant. With this switch, you can enjoy controlling your home devices remotely with your voice. Please disconnect the power supply before installing the device. A neutral wire is required for the device. The router must be a 2.4 GHz device; 5.0 GHz Wi-Fi is not supported. There are no restrictions on the smartphone network.