1. high frequency transformer 2. PCB LED Usage 3. copper wire , 13 years experience 4 .resonable price 5 ISO / CE Electrical and Electronic TransformerQuick DetailsPlace of Origin: Beijing China (Mainland)Brand Name: ZJModel Number: EIUsage: ElectronicPhase: SingleCoil Structure: ToroidalCoil Number: according to requirementshigh efficency: low losssilicon still inserted: PBT,PPT bobbinhigh ...