1) High Frequency Switching power supply transformer 2) SMD transformers, Small transformers 3) OEM/ODM accepted 4) ROHS ... to meet your needs.MTEER Series High Frequency Switching power supply transformer MTEER25/EER28L/EER29/EER35/EER39/EER40/ ... sets, Microcomputer equipment, printers, Terminals3. communications control equipment4.Switching power supply, chargers, alarm system5. UPS, VCD/DVD players, ...