Magnetic Transducer 1) 6-12-24-36-48V, 40-65mA 2) 2300Hz 85dB 3) Dia.12*9.5mm, 2g BLACK 4) Good quality, price, delivery. YMD-12095-B Magnetic Transducer 6V 12V 24V 36V 48V For more details about our products, please check our website www.cnglobaltone.comIf any inquiry or question, please feel free to contact us. YMD-12095-B Magnetic Transducer 6V 12V 24V 36V 48V