Product Name: DC5V 12mm Buzzer Magnetic Electronic Mini Active Model NO.: TMB12A05 Brand: Sz-Xdz Certification: ISO9001 Usage: Accept Radiation Mode: Indirect Radiation Type Style: Mini Transducer Principle: Magnetic Earphone Cone: Plastic frame Transmission Mode: Air-conduction Category: Buzzer Rated Voltage: 5V Weight: 2g Trademark: SZ-XDZ Transport Package: Export Standards for 12mm Buzzer Specification: 12x9.5mm Origin: China Product Description TMB is a commonly used product ,it is made of high temperature resistant materials,and good quality.