MiOYOOW Boost Buck Voltage Converter, DC-DC 5V-24V to +/-3V-30V Step UP Down Power Supply Module Adjustable 20W Positive Negative Dual Output Voltage Charging Converter for Amplifier

Boost Buck Voltage Converter, DC-DC 5V-24V to +/-3V-30V Step UP Down Power Supply Module Adjustable 20W Positive Negative Dual Output Voltage Charging Converter for Amplifier

DROK Micro Dual Power Supply - DC to DC Buck Boost Converter 4.8-35V to ±15V Positive Negative Dual Output, Step Up Voltage Regulator for OP-Amps

DONGKER TPS5430 Voltage Regulator Module,DC-DC -12V 12V Positive Negative Dual Output Module Power Supply Module with Switching