This 100W USB-C cable with a built-in power meter is just $9.79 for Prime Day

The SooPii (yes, that’s the brand) USB-C to USB-C cable can deliver up to 100W of power, and its in-line meter gives you a live reading of how much wattage is reaching your device

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Amazon Prime Early Access deals come in all shapes and sizes, and sometimes they come from brands with silly names that make us chuckle like children. Case in point: the SooPii 100W four-foot USB-C cable, which is on sale for just $9.79 at Amazon. This deal is exclusive to Prime members, but it knocks $4.20 (nice) off this handy, black cable. There’s also a red version for the same $9.79, which represents a steeper discount of $9.20 — because the color red looks cool, and cool colors cost more, I guess. If a four-foot-long cable is too short for you, there’s also a 6.6-foot version in black or red for $12.79 ($3.20 off).

But hang on, Sloopy, there’s a bit more you should know about this cable. While it’s super convenient for charging, its USB 2.0 data transfer speeds are nothing to write home about. This cable is more about monitoring power, and for this price, I don’t mind that limitation. In fact, the red one will make a fine addition to my collection.

These kinds of power metering cables are a relatively recent innovation, and many of us here at The Verge love them. Turns out, it’s genuinely helpful to actually know how much power is reaching your devices, helping ensure your phone or laptop is charging optimally.