DC/DC Step-down converter with LCD and trasparent case
XL4015 Step-Down DC-DC converter
DC to DC Step Down Buck Converter Power Supply Module 4V-38V to 1.25V-36V
UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output : ID 1385 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
1 x DC-DC Digital Display Step Up Step Down Boost Board Buck Converter Power Module: Amazon.com: Industrial & Scientific
DC To DC 5A Step Down Converter
LM2596s DC DC Step down Converter Power Supply Module 3A Adjustable Step Down Module LM2596 Voltage Regulator 24V 12V 5V 3V|Inverters & Converters| - AliExpress
Amazon.com: Lysignal LM2596 DC-DC Step Down Power Supply Module 3A Adjustable Step Down Module Buck Converter 24V to 12V 5V 3V : Electronics
300W High Power DC-DC Step Down Converter at Rs 320/piece | DC-DC Converters - Nex Digitronix LLP, Pune | ID: 20578198155
Nettigo: DC/DC STEP-DOWN converter module CX8571 9-36V to 5.2V 6A USB Fast Charge [Yā nǔ shén]
DC/DC step-down converter module 1-17V/1A, miniature | GM electronic COM