Operating Voltage V: 4 ~ 6 Rated Voltage V: 5 Rated Current mA: Max. 80 Coil DC Resistance : 40 ± 5 Sound output ( at 10 cm ) dBA: Min. 90 Rated Frequency Hz: 2700 Operating Temperature º C: -20 ~ +70 Storage Temperature º C: -30 ~ +85 Terminal : SMD Housing Material / Color: LCP / Black Weight g: 0.9.