J1UL1N Power Module DC-DC Buck Step Down Converter 4.2V To 3V 5Pcs 4.2V To 3V Output Module Replaces AA AAA Dry Battery

EU LVD Voltage : Low voltage: Below 50Vac or 75Vdc High-concerned chemical : none Origin : Mainland China Specification 1 : 42V to 3V step down module Specification 2 : step down module Specification 3 : 3V power supply module Specification 4 : 42V to 3V power supply module Specification 5 : power supply module