PARAMETER SAT-11A-01 SAT-11A-02 SAT-11A-05 UNIT RESONANT FREQUENCY 2048 2048 2048 HZ OPERATING VOLTAGE 1-2 2-4 4-6 V RATED VOLTAGE 1.5 3.6 5 V MIN SOUND OUTPUT AT 10MM Min85 Min85 Min90 dB COIL RESISTANCE 16? 16? 30? Ω RATED CURRENT ≤30 ≤30 ≤50 mA OPERATING TEMPERATU -30～+70 -30～+70 -30～+70 ℃ STORAGE TEMPERATURE -40～+85 -40～+85 -40～+70 ℃ WEIGHT GRAM HOUSING MATERIAL MPPO MPPO MPPO BLACK