Model:	DMT-09-1-4A	DMT-09-1-4B	DMT-09-1-4C
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:*	80 mA max.	70 mA max.	70 mA max.
Sound Pressure:*	85 dB min.	86 dB min.	87 dB min.
Coil Resistance:*	6 +/- 1 OHM	16 +/- 2 OHM	40 +/- 4 OHM
Coil Impedance:	15 OHM	35 OHM	80 OHM
Resonant Frequency:	2,730 Hz	2,730 Hz	2,730 Hz
Operating Temp:	-20 ~+70degree C	-20 ~+70degree C	-20 ~+70degree C
Weight:	0.7 gram	0.7 gram	0.7 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