specification (all data taken at 25c unless otherwise specified) value applying rated voltage, rated frequency, 50% duty square wave h electro-magnetic sound generators www.jlworld.com jl world rated voltage (v) 3 operating voltage (v) 2 ~ 4 h rated current (ma) 80 coil resistance ( ) 16 2 w h sound output at 10cm (db) 3 87 rated frequency (hz) 2700 operating temperature (c) -30 ~ +70 storage temperature (c) -40 ~ +85 modelHCS0903R dimension unit : mm tolerance : 0.3mm frequency response applied voltage : 3.0v, 50% duty square wave measuring distance : 10cm hcs09r series 8.5 8.5 5.5 5.5 4.0 0.15 1.5 1.5 3 digits date code + xxx jl sound port 03r
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