Model:	DMT-9SEH-427-01	DMT-9SEH-427-03	DMT-9SEH-427-05
Rated Voltage:	1.5 VDC	3 VDC	5 VDC
Operating Voltage:	1 VDC - 2 VDC	2 VDC - 4 VDC	4 VDC - 6 VDC
Current Consumption:*	70 mA max.	70 mA max.	70 mA max.
Sound Pressure:*	80 dB min.	80 dB min.	80 dB min.
Coil Resistance:	6 +/- 2 OHM	15 +/- 3 OHM	30 +/- 5 OHM
Coil Impedance:*	abt 12 OHM	abt 45 OHM	abt 60 OHM
Resonant Frequency:	2,731 Hz	2.731 Hz	2.731 Hz
Operating Temp:	-20 ~+ 60degree C	-20 ~+ 60degree C	-20 ~+ 60degree C
Weight:	0.9 gram	0.9 gram	0.9 gram

* Applying rated voltage (square wave, 1/2 duty, resonant frequency)
* Distance at 10 cm (applying rated voltage: 2,700 Hz, 1/2 duty, square wave) 
* Applying resonant frequency, sine wave, measuring current 60mA