Sentus M4 ML-M4 Open-Top Automatic Cat Litter Box

The Sentus M4 ML-M4 is an open-top automatic litter box with app control and manual operation. Its listing describes safety sensors, odor management, a waste drawer, and support for cats weighing 3.3–20 lbs. The claimed 10L drawer and quiet operation may suit households looking to reduce routine scooping, though the listed dimensions need clarification.

At a glance

App control over 2.4GHz Wi-Fi is described for managing cleaning cycles and settings, viewing activity, and receiving waste notifications. Manual operation is also stated to work without Wi-Fi.
The listing says infrared sensors, microwave radar detection, and anti-pinch protection are designed to pause cleaning when cat activity is detected.
An open-top layout and entry step are listed, with support specified for cats weighing 3.3–20 lbs.
The manufacturer claims a 10L waste drawer, a deodorizing block, and operating noise of ≤40 dB.

Price

$239.98Save 27%

Reference price: ~~$329.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Manual operation is available without Wi-Fi, according to the listing.
The stated cat weight range and open-top entry design provide useful fit information for shoppers.

Technical specifications

4 specifications

Identity
Brand	Sentus
Model	ML-M4

Dimensions and installation
Weight listed	19.8 pounds

Materials and protection
Material listed	Polypropylene (PP)

What to know before buying

Listing details to confirm

The listing gives two different dimension/weight presentations: 21.06"L x 17.91"W x 13.19"H and 21.06 x 17.91 x 13.19 inches; 19.84 pounds, while another weight entry says 19.8 pounds. Confirm the intended dimensions and weight for the selected listing. The claims of support for multiple cats and quiet operation are not accompanied by a capacity or noise measurement beyond the stated ≤40 dB.

What’s in the box

Included

Deodorizer (1)
Entry step (1)
Cleaning brush (1)
Litter liners
Support legs (4)
Quick-start guide (1)
User manual ×1
Self-cleaning litter box (1)
Waste drawer (1)
Power adapter ×1

Who is it for?

A good fit for

Households seeking automatic waste separation with app-based controls and phone notifications.
Cat owners who prefer an open-top entry and want manual operation to remain available without Wi-Fi.

Less suited to

Buyers who need confirmed external dimensions before choosing a space for the unit.
Households that require a verified waste-drawer capacity or measured noise level before purchase.

Sentus M4 ML-M4 Open-Top Automatic Cat Litter Box · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.9 / 5 · 33 ratings

5 stars86%86%
4 stars14%14%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied evidence includes aggregate ratings but no review-summary text. Those ratings lean positive, but they do not establish what customers liked or disliked, or how the box performs in particular households.

Frequently asked questions

Does the Sentus M4 work without Wi-Fi?

The listing says manual operation is available without internet connection. App control is described as using 2.4GHz Wi-Fi.

What cat weights does the listing support?

It specifies cats from 3.3–20 lbs.

What is the waste drawer capacity?

The feature description claims a 10L waste drawer. Confirm this capacity on the selected listing if it is important to your use.

Are the dimensions consistent across the listing?

No. One entry uses length, width, and height labels, while another gives the same numbers without those labels and adds a different weight figure. See the listing-details note and confirm the dimensions before buying.