Electric equipment

Electric equipment comprising:

• a command input unit to which a switching command is input contactlessly from an outside;
• and a mode switcher configured to switch an electric circuit of the electric equipment between a normal operation mode and a sleep mode in response to the input switching command, wherein
• the normal operation mode includes the normal operation mode in an unlocked state in which switching to the sleep mode is allowed, and the normal operation mode in a locked state in which switching to the sleep mode is prohibited, and
• the switching command includes
• a first switching operation for switching the normal operation mode to the sleep mode,
• a second switching operation for switching the sleep mode to the normal operation mode and keeping the normal operation mode in the unlocked state, and
• a third switching operation for switching the sleep mode to the normal operation mode and keeping the normal operation mode in the locked state, the third switching operation having a longer input time or a more complicated input mode to the command input unit than an input time or an input mode of the second switching operation,
• the switching command uses any one of magnetism, light, or a sound wave as a carrier,
• the command input unit includes a carrier detection sensor configured to detect the carrier, and
• the electric equipment further comprising:
• a radio circuit;
• a channel switcher configured to switch a channel of radio communication by the radio circuit to a first channel or a second channel in response to the input switching command on condition that the normal operation mode is not in the locked state;
• and
• first and second carrier detection sensors as the carrier detection sensor, wherein
• the switching command is determined as the second switching operation or the third switching operation depending on one of a difference in a detection length that is a time during which the carrier detection sensor continuously detects the carrier, and a difference as to which of the first and second carrier detection sensors detects the carrier, and a command as to whether the first channel or the second channel is to be used is determined by another difference.