Product details:

This is a radio controlled switch for the switching of mainspower to lighting and appliances up to 250W. Only the Line is switched to the load. Switching is initiated either by radio control or manually by pressing the button on the housing. It is compatible with Mi Home Remote Control (MIHO003) and the Mi Home network. It is a receive-only device operating in the 433MHz ISM short-range band using OOK modulation.