USB Charger Doctor for Voltmeter and Ammeter 5V Mini Fan for Raspberry Pi Set of 4 eliminates the

Set of 4 eliminates the hassle of sourcing wheels individually

Affordable Renewable Energy: An economical entry point into solar-powered electronics without investing in large

Regenerative Braking Capable: Supports energy recovery during braking and downhill riding

No Tools Required: Snap-together assembly with clearly numbered parts - no soldering

USB Charger Doctor for Voltmeter and Ammeter 5V Mini Fan for Raspberry Pi Set of 4 eliminates theUSB Charger Doctor for Voltmeter and Ammeter Monitor Your USB Power Like a Pro The USB Charger Doctor is a compact, inline diagnostic tool that lets you measure real time voltage and current flowing through any USB connection. Simply plug it between your USB power source and device to instantly see voltage (V) and current (A) readings on the built in digital display. Whether you're testing chargers, diagnosing slow charging issues, or monitoring power