USB Voltage Meter with OLED Display : ID 2690 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
USB C Tester, 3 in 1 Type C DC5.5 USB Meter USB Load Color Screen IPS Digital Multimeter,Voltage,Current,Power,Resistance,Capacity Detector,with Clip Cable Support PD2.0/PD3.0,QC2.0/QC3.0: Amazon.com: Tools & Home Improvement
How Much Power does USB Port Output? (USB 1.0, 2.0, 3.0)
How Much Power does USB Port Output? (USB 1.0, 2.0, 3.0)
USB-CAP
USB-Powered Voltage and Current Output Devices - Measurement Computing
USB Power Source Charger Adapter, EEEkit Charger Converter Adapter Fit for Dewalt DCB091 Converters Lithium-Ion Battery, Fit for Dewalt 18V 20V Max with 2 USB Port, DC Port, and Bright LED Light -
ee-203 Real-Time Current Monitor with USB | Tag-Connect