Werma signaltechnik electronic multi tone sounder werma signaltechnik 140 120 68 p the werma signaltechnik 140 120 68 is a multi tone electronic buzzer with an adjustable sound output of up to 100db making it suitable for large areas the buzzer has a wide operating voltage of 110 240v ac and 32 tones that are ideal for varied applications two of which can be controlled externally p werma signaltechnik 140 120 68 multi tone electronic buzzer 93mm 100db