TDB-05N Magnetic buzzer by IMO. Package: 11.6mm Dia x 9 mm high. Pins: 2 off. 6 x 0.6mm Dia. Ratings: 5VDC (operational: 4 to 7 Vdc), I(max) 30mA Frequency 2300 Hz +/- 300 Hz. 85 dB @ 10cm. Download IMO TDB-05N datasheet (large file) : RoHS compliant: YES