4.Electrical characteristics 4.1 input power: 1vac (sine wave), 1khz 4.2 operating temperature range: -20=j ~ 70=j 4.3 operating humidity range: 95 %rh or less 4.5 accuracy: f+5 %rh (at 25=j, 60 %rh) 4.6 hysteresis: within 2 %rh (40 %rh ~ 80 %rh) 4.7 stability: 1 year < 2 %rh 500pcs/bag 10000pcs/carton