Tone setting and volume adjustment can only be achieved when unit is not fully installed. (Controls are mounted on the rear of the unit). Multi-Tone Electronic Buzzer 110. Designed for industrial use Protection to IP65 Sound output 100dB at 1m Switchable 8 tones Tone Frequency 1.6kHz to 3.4kHz Sweep/pulse 1Hz to 420Hz Volume control Supplied with screw terminal connector and sealing gasket Vertical wall mounting bracket available separately Housing material PC/ABS black Front protrusion 39.6mm