intermittent tone, high intensity with 8 LEDs, mtg. hole: 1.25", sound frequency:3.5+/-.5 KHz, terminal .187", brass tin plated, operating voltage: 3-15V DC, rated voltage: 12V DC, current draw: 18mA @12VDC, sound pressure up to 95dB @ 1 ft., operating temperature: -20° to + 70°C