EnergySaving Operation for Hotels The 125KHZ low frequency power supply switch activates electrical circuits only when a matching noncontact induction card is detected, reducing energy usage in hotel rooms while maintaining guest comfort. Accurate Card Frequency Detection Low frequency detection technology quickly verifies whether noncontact induction cards match the required 125KHZ standard, enabling precise power activation for systems compatible with EM, TEMIC, and TI card formats without false triggers. Wide Voltage and Strong Current Capacity The power supply switch supports an input range of AC40V–220V at 50Hz and handles currents between 40A–45A, enabling operation in diverse electrical environments while delivering reliable functionality under heavy load. Convenient Delay Feature Integrated 1520 second delay provides a grace period after card removal, preventing abrupt power cuts and allowing hotel guests time to exit or complete actions. Use Scenarios Hotel guest rooms: cardbased power control for lighting, HVAC, and outlets to save energy without compromising comfort. Serviced apartments or dormitories: resident card detection ensures power is supplied only when a card is present, simplifying energy management. Small offices or meeting rooms: use with access cards to power devices during occupancy and reduce standby energy.