An optical modulator includes a Mach-Zehnder optical waveguide that includes a pair of parallel waveguides, and a two-input-one-output optical coupler that couples light output from the parallel waveguides; a branching waveguide that branches a portion of light output from the optical coupler; and a light receiving unit that receives the light output from the branching waveguide. A reservoir contains a deodorizing liquid having a liquid surface and has a reservoir inlet positioned above the liquid surface and connectible to the outlet of the vacuum pump, and a reservoir outlet. The ringtone is selected from the number of ringtones based on the user preferences indicating the desired method for selecting the ringtone from the number of ringtones. The power control mechanism controls the rotor mechanism through the transmission mechanism and the control mechanism.