... very easy and quick to be installed and operated 12. With inner back-up battery, when the power is off, it ... still can work about 12 hours.13. With output relay, can control the home appliance, like light, cooker ... on Technical parameter: Operating voltage: Input 100-250V, output 12V. Wireless receiving distance: >100mOperating Frequency: 433 MHZ, 850/900/1800/1900MHZStandard ...