240W USB C Adapter Power Meter Tester (2 Pack) - Wattage, Voltage, Amperage LED Digital Display, Type C Male to Female Extension Connector for iPhone 15/16, MacBook, iPad & More USB-C Cables/Devices

Very nice, simple unit to debug power consumption. Small, works well, and seems decently built. I used this to debug power issues with a Macbook, though see that it works for any USB PD device. It allowed me to discover that not all USB C laptop chargers are PD.

The LED display is clear and easy to read, even at a quick glance. I haven’t had a single issue with it—it just works exactly as expected. If you need a reliable way to monitor your power output, this is a great tool to have on hand.

They work fine, with readings differing by 0.1V. I guess that's OK for the price. Voltage drop down to 4.5V when I put a flash drive in the output, feeding it with another powered hub, but maybe that's normal. Haven't tried that test using another, more expensive, tester I bought. The flash drive worked fine, but the specs for USB are +/- 5%, meaning it shouldn't go lower than 4.75V. I wouldn't buy this as a primary tester, but as a backup they are tiny and cute and work.

These are my favorite. They alternate between volts, amps, and watts while most just show watts. This is helpful diagnosing charger capabilities. Nice, bright display. Works up to 240 watts.

I recently got my hands on this excellent USB-C voltage meter tester adapter, and it's been incredibly useful. The Power Digital LED Display Design makes monitoring wattage a breeze, ensuring my devices are always in good shape. The 240W PD Fast Charging & 40 Gbps Data Transfer guarantees my MacBook and other USB-C devices are always powered up and running smoothly. The Universal Compatibility is impressive, working seamlessly with my iPhone 15. However, I've noticed a slight misalignment with some of my more expensive devices, occasionally showing a mismatch of greater than 5 watts. Overall, this 2-pack USB-C tester power meter adapter has it's uses for a quick cheap way to see how much power your device is consuming but don't lean on its accuracy too heavily. I would recommend if you need a quick cheap way to visualize charging speeds.

Works great, accurate.

This is a very tiny, in-line, USBC-to-USBC, Voltage, Amperage & Wattage meter. I have used it on my laptop, and my phone, to watch its charging current & voltage, and it seems to match closely with the external charger's readout. The small display cycles through Voltage, Current & Wattage.I primarily use it to identify cables which are not charging well any more. I can take two of my trusty cables & discover one of them may not be performing as well as the other. As said, it is tiny, and will be very easy to lose, so I have to keep track of it among my many cables, batteries, connectors & chargers.

This device switches between displaying the voltage, the amperage and the wattage and displays in tiny letters the corresponding V,A or W.