To provide a television which properly takes crime prevention measures according to situation, even if there is a person.

When a scheduled viewing time has come, if no person is sensed by a human sensor 6 in step 5, the television sets security mode in step 6. If loud sound volume, loud bass sound, and dark screen are set by a user in security settings, when a security settings enabling circuit 5 transmits the security settings to an audio visual output device 3 in step 6, the audio visual output device 3 turns up the volume of voice, especially bass voice, and displays a dark screen image. Then, in step 7, a determination is made whether the scheduled viewing end time has come or not, and if the time has come, power is turned off in step 8.