Headphones including a sound output unit, a processing unit, a memory unit, a lighting unit, and a detection unit are provided. The sound output unit is configured to output sound. The memory unit is configured to store a program. The lighting unit is configured to emit light in response to a signal supplied from the processing unit. The detection unit is configured to obtain detection information and supply a detection signal corresponding to the detection information to the processing unit. The processing unit is configured to read out the program, carry out an operation using the detection signal and the program, and supply a signal corresponding to an operation result to the lighting unit.