USB 5V To 3V Converter Step Up Voltage Converter Power Cable Black Red For DIY Multimeter Microphone Toy's Remote Medical Device

Does it include wireless functionality? : No Does it include a Battery? : No EU LVD Voltage : Low voltage: Below 50Vac or 75Vdc High-concerned chemical : None Voltage : 5 V 12 V 20 V 30 V Origin : Mainland China