The switch has 2 positions: One for the high frequency ringer sound and the other for the lower frequency ringer sound. It has a light and switch to select between a high and low frequency ringer sound.
Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell8242
2X(Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell9739
Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell2451
1X(Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell6187
2X(Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell1527
Telephone Ringer Phone Amplifier Wall Speaker Strobe Light Flasher Bell3243
