... based control oflighting, HVAC and miscellaneous electric loads. The switch is self-powered and thesimple act of inserting or ... awireless signal to YTLreceiverswithin the room. To operate the switch, guests simply insert their key card in the slot ... , schools, homes, factories, hospitals, municipal buildings, and other indoor places.Parameters l Range: 15–50 ml Energy harvesting source:Maintenance ...