These are reasonably decent USB-C/C charging cables that appear to be well-constructed (PVC jacket) for the most part; however, they do NOT support any video output nor do they support high speed transfer typically associated with USB-C because they're only rated for USB 2.0 @ 480Mbps. As such, if high speed data cables are what you're after, look elsewhere.✘ Note that these are NOT USB 3/4 cables and they're certainly NOT TB3/4 cables (which use USB-C connectors). As such, they only support charging without video although they do support data transfer albeit at the traditional/typical 480 Mbps rated for USB 2.0 interface.The physical build quality of these USB-C/C cables seems good but not as fancy as some others especially comparing to those with aluminum or zinc alloy shell/cap. In addition, these are made with old school PVC jackets instead of being nylon braided, and they are noticeable stiffer than most others with similar spec (i.e. charging and USB 2.0 speed only). In any event, they do work just fine without issues although they do have a somewhat questionable longevity in comparison.They are capable of at least 140W (pic 7) during the tests although they do consume (or rather, waste) about 5-7W @ 140W so the max power delivered to the device is only around 133W @ 5A. No speed tests were performed because, well, let's face it, 480 Mbps isn't what it used to be and I have no plans to use these as data cable; however, tests (pic 9) were conducted to make sure they have all the pins required to carry data signals and they indeed do.≡ PD 3.1/EPRA quick note on EPR since it's mentioned in the title; it stands for Extended Power Range and it's the new standard added to our existing SPR (Standard Power Range) which is part of PD 3.0 spec that allows for up to 100W (20V/5A) power. EPR adds 28V, 36V and 48V into the mix in addition to the 20V currently specified in PD 3.0.As such, it allows for a maximum of 240W (48 V x 5 A) for devices supporting and certified for EPR which has begun to surface (PD 3.1 launched back in 2021). EPR mandates the use of AVS (Adjustable Voltage Supply) which supports granular voltage increase at 100 mV (0.1V) steps from 15V to 48V. AVS is the equivalent of PPS (Programmable Power Supply) in PD 3.0; however, PPS is optional in PD 3.0/SPR whereas AVS is mandatory in PD 3.1/EPR.≡ NoteIt goes without saying that an EPR compatible and CERTIFIED cable is required to achieve 140W which I can NOT verify (from USB-IF) because cable doesn't bear ANY relevant info/ID/code that can be used to verified against which is quite disappointing to say the least. Also keep in mind that there are no (or at least exceedingly few) 140W, 180W, or even 200W rated cables.According to the USB-IF (the governing body for, well, all things USB), EPR certified cables are to replace the existing 100W (20V/5A) cables with a clear mark identifying the cable capable of supporting up to 240W and there isn't anything in between 240W and 100W. As such, if you see anything marketed as 140W or 180W etc, then chances are they are not legit (at least at the moment) and they should be avoided. Again, the next level up from 100W certified cables are 240W.###≡ ValueAll things considered, these are reasonably decent USB-C/C charging cable rated at 240W (140W verified) that supports the highest power rating available at the moment. They do NOT support video at all although they do support SLOW data transfer at 480 Mbps (USB 2.0 rate). These are the cheap and low cost alternative to USB/TB 4 cables that could easily run for $20-25+ especially when you don't need what they provide unless you require video and/or high sped transfer (20/40 Gbps).They're somewhat reasonably priced at $26 (for a 2-pack of 3m/10ft each) for what they provide and their overall build quality, usability, versatility, and performance; however, there are other options and alternatives from other slightly well-known brands that DO have verifiable data (for a few bucks more) if you care to shop around. Your mileage might vary.