Apparently, this skincare device works “so great” that its biggest fans are keeping it a secret.
At least, that’s what some people using the RENPHO 4D Red Light Therapy Mask are saying on Amazon.
The trending red light therapy mask, which features 324 LEDs as well as a perfectly contoured design, is designed to deliver “beauty-enhancing light therapy” while targeting every curve of the face. It’s currently on sale for 25% off during Amazon Prime Day 2026, which runs from June 23 to June 26 this year — bringing the price down to just under $150.
The popular mask has racked up hundreds of rave reviews on Amazon, with many customers claiming that it’s incredibly easy to use and the benefits are noticeable fast. Some say that even friends and family have seen a difference in their appearance.
“I put it on while watching TV. I can confirm it works great,” one reviewer gleamed. “After a week, my skin is undeniably brighter. My fine lines are blurring faster than my eyesight, and my friends are asking what foundation I’m using…”
They say that they tell them — “It’s just good lighting” — and technically, it is.
The 4D Red Light Therapy Mask is a popular pick in RENPHO’s fleet of trusted wellness and beauty offerings. According to the brand, it was designed to make red light therapy easier for users at home — with its completely cordless design and simple setup.
The mask features 324 LEDs and offers three different modes for different skincare needs. Renpho says that Mode 1 combines red and infrared light to help reduce full-face wrinkles. And, the blue light mode and the mixed light mode are ideal for mild to moderate inflammatory acne management.
Made with a lightweight silicone design, the 4D Red Light Therapy Mask is easy to fold up and bring with you anywhere, even while traveling. And, at its more accessible Prime Day price, it’s an especially worthwhile investment for anyone who’s looking for a simple approach to red light therapy.
Prime Day is Amazon’s biggest sale of the year, offering deep discounts on bestsellers and everyday essentials. This year’s event runs from Tuesday, June 23 at 3 a.m. ET through Saturday, June 27 at 3 a.m. ET.
This year, shoppers can take advantage of four days of Prime Day deals: Tuesday, June 23 at 3 a.m. ET through Saturday, June 27 at 3 a.m. ET.
In addition to pushing up the sale to June, Amazon is including several new programs and promotions, including:
Prime Day and all its amazing discounts are exclusively available to Prime members. However interested shoppers can grab a 30-day free trial to try Prime, and its many benefits with no strings attached, and gain access to exclusive deals and the convenience of fast, free shipping.
From reporting on Amazon sales for years, we can tell you for certain that Prime Day is the ideal time to stock up on beauty and skincare staples, score big-ticket tech for less, bestselling vacuums, and comb through the massive catalog of Amazon best-sellers. Plus, since this year’s sale runs before the Fourth of July Americana-themed deals and summer hosting essentials.
We certainly think so! Prime Day is a great chance to score deals on thousands of best-sellers, top tech and appliances and every day essentials. Our team diligently sorts through all the offers to find you only the very best items to grab on sale.
Already wondering when Amazon’s next Prime Day is? We expect Amazon’s October Prime Big Deal Days sale event to return in fall 2026. Follow Post Wanted’s around-the-clock coverage, and you’ll be the first to know about headline-worthy sales. Click here to find all of the best deals.
This article was written by Miska Salemann, New York Post Commerce Writer/Reporter. As a health-forward member of Gen Z, Miska seeks out experts to weigh in on the benefits, safety and designs of both trending and tried-and-true fitness equipment, workout clothing, dietary supplements and more. Taking matters into her own hands, Miska intrepidly tests wellness products, ranging from Bryan Johnson’s Blueprint Longevity Mix to the viral Oura Ring to Jennifer Aniston’s favorite workout platform – often with her adorable toddler by her side. Before joining The Post, Miska covered lifestyle and consumer topics for the U.S. Sun and The Cannon Beach Gazette.
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