... design; ROHS REACH 9*4mm the side emission magnetic buzzerMagnetic transducer without driving circuitDiameter:9mm;Type:side ... Piezo electric, electromagnetic, mechanical), piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor,Atomization piece, speakers ... of our products have ROHS reports.We strictly carry out the aim of “Quality First, Customers First, ...