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