品牌 hydz 型号 hyt-12 种类 蜂鸣器(片) 材质 abs ppo 耐高温 规格尺寸 12*9.5（mm） 声道数 单声道 hyt-12 specificatio type unit hyt-1201 hyt-1203 hyt-1205 hyt-1212 rated voltage v 1.5 3 5 12 operating voltage v 1.2-3 2-5 4-7 4-12 8-16 * rated current(max) ma 20 30 30 12 30 * min sound output at 10 cm db 80 85 85 80 85 * resonant frequency hz 2300±300 operating temperature ℃ -20～+70 storage temperature ℃ -30～+85 housing material noryl weight g 2 .