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Many dentists are now recommending electric toothbrushes over manuals because of increased efficiency in removing plaque and build-up. We understand that an ultrasonic toothbrush can cost much more, but thousands of shoppers swear by the results. The good news is, Amazon’s top-rated model is on sale ahead of Amazon’s first-ever Prime Big Deal Days—aka Prime Day 2 or October Prime Day. While you missed your chance to score the limited-time half-off Lightning Deal, you can still get the Aquasoinc Black Series Electric Toothbrush is currently 33% off, bringing it to just under $40. 

That is still a major steal, considering it comes with seven additional replacement heads, a travel case, and a wireless charging dock. Each brush head is made to last for up to four months, so you’ll be set for at least two years. Meanwhile, similar brands cost $100 or more and don’t come with as many accessories.

Aquasonic Black Series Electric Toothbrush, $39.95 (was $60) at Amazon

This electric toothbrush has a waterproof and BPA-free design with a powerful motor that delivers up to 40,000 vibrations per minute to remove up to 10x more plaque. It also features four cleaning modes: clean, soft, whiten, and massage. The “clean” setting is ideal for everyday use, while “soft” is great for those with sensitive teeth that require a gentler clean. Regardless of cleaning mode, it’ll automatically start a two-minute timer that helps ensure you’re brushing for an adequate amount of time. Once the time is up, it’ll power down on its own.

Its incredible battery is another perk of using this specific model over others. It can last for up to four weeks on a single charge and doesn’t take long for the battery to recharge on its wireless dock. This makes it great for travel since you don’t have to worry about it dying or lugging around extra cables.

If you’re skeptical of the quality of this toothbrush due to its low price, take it from over 79,500 shoppers who have given it a five-star rating. Plus, it has the stamp of approval from the American Dental Association (ADA).

“I recently started using this toothbrush and I’ve been blown away by the results,” one reviewer wrote. “After just a few uses, I noticed a significant difference in the brightness of my teeth. Overall, [the] toothbrush is an excellent investment in your oral health and will leave your teeth looking and feeling amazing!”

There’s no telling how long the Aquasonic Electric Toothbrush will be marked down to just $30 ahead of Amazon’s Oct. shopping event, especially as the deal has limited quantities, so add it to your cart while you can. It’s one of the more sought-after products, with over 10,000 purchases over the last month, so it’s definitely a sell-out risk.

Prices are accurate and items in stock at time of publishing.