A dial, or a screen
Is a digital display worth the step up?
Same plate width, same floating plates, same fifteen-second heat-up, same 150–230 °C (302 to 446 °F) range. What changes is how you select a temperature and whether you can see which one you selected.
| Compared on | S3500 | S8540 |
|---|---|---|
| Plate length | 110 mm (4.33 in) | 110 mm (4.33 in) |
| Plates | Floating, ceramic-tourmaline | Floating, ceramic with keratin and almond oil |
| Temperature range | 150–230 °C (302 to 446 °F) | 150–230 °C (302 to 446 °F) |
| Number of settings | Ten | Nine |
| Display | LED ready light | LCD, showing the setting |
| Named setting | Not published | Pro+ at 185 °C (365 °F) |
| Heat-up | 15 seconds | 15 seconds, plus a temperature boost |
| Auto shut-off | After 60 minutes | Not published |
| Listed on amazon.com | No | Yes |
A tick marks the better answer on that line only. Counting ticks does not decide the page — the two verdicts below do, because these products answer different questions.
No amazon.com listing was found for this one. We hold references for other markets but none for the United States, so it may not be buyable here — which is the first thing to weigh against anything below.
Take the S3500 if you set a temperature once and leave it. It has one more setting than the S8540, a published auto shut-off, and everything else is identical.
Take the S8540 if you change temperature between uses, or share the tool. A screen removes the guesswork of a dial position, and the boost function reaches the top of the range without waiting.
Both are 110 mm (4.33 in) long and both are floating; Remington does not publish their width. The coatings differ in what Remington adds to the ceramic — tourmaline on one, keratin and almond oil on the other — which is a manufacturer description rather than a measurement, and reported as such on both pages.
Not a question this site answers. Both publish a range of 150 to 230 °C (302 to 446 °F); the manual that comes with the tool carries the guidance, and a hairdresser who has seen your hair carries the rest.
110 mm (4.33 in) plates · 10 settings, 150–230 °C (302 to 446 °F) · 15 s heat-up · auto shut-off
Floating plates 110 mm (4.33 in) long, with a ceramic-tourmaline coating, ten temperature settings between 150 and 230 °C (446 °F), fifteen seconds to heat, and an automatic shut-off after sixty minutes.
Best for: Short to mid-length hair, and a first straightener where the temperature must still be adjustable.
110 mm (4.33 in) plates · LCD, 9 settings 150–230 °C (302 to 446 °F) · Pro+ 185 °C (365 °F) · 15 s
The same 110 mm (4.33 in) floating plates on a digital body: an LCD display with nine settings from 150 to 230 °C (302 to 446 °F), a dedicated Pro+ setting at 185 °C (365 °F), a temperature boost, and a keratin and almond oil ceramic coating.
Best for: Someone who wants to set an exact temperature and see it, rather than trust a dial.
≈ $70
