Guangzhou FEIER Electric Co., Ltd. was established in 2008. We are a professional company manufacturing hearing aids, sphygmomanometers, temperature detectors and other products. We have many years' production and R&D experience. The annual production capacity is more than 350,000 pieces. Equipped with internationally advanced 6500-CX hearing aid automatic analytical testing instruments, each indicator meets GB/T6657-86 Chinese national standards, the US ANSI92 standard and IEC-118-7/94 ...