Our take
Emerson MW8991SB is a verified 0.9-cu.-ft., 900-W countertop microwave with a stainless-steel front and black cabinet. Its controls are more specific than the title suggests: eleven power levels, six fixed menu buttons, time/weight defrost, two-stage cooking, five memory slots, clock/timer and child lock are documented. The six automatic recipes are not labeled as sensor cooking. The sources also leave input amperage, turntable diameter, trim-kit compatibility and commercial duty unresolved. Dimensions are a practical weakness in the documentation: the manual and Office Depot give one footprint, while the manufacturer specification sheet gives a different approximate set. The historical Amazon ASIN B0014E44S0 failed its current page check, so the affiliate link searches the exact MW8991SB code.
Consider MW8991SB if a 0.9-cu.-ft. cavity and 900-W output meet your needs. The control panel offers eleven power levels, six fixed recipe buttons, time/weight defrost, two-stage cooking, memory and a child lock. The cabinet is black with a stainless-steel front, so it is not an all-stainless enclosure. For countertop planning, the manual asks for a steady, flat surface and unobstructed vents; it does not publish an exact trim-kit path or built-in clearance. The manual lists 20.1 × 15.1 × 11.2 inches, while the specification sheet provides a different approximate size of 19.1 × 14.7 × 11.5 inches. Check the specific unit before a tight fit. The historical Amazon ASIN could not be verified, so the tagged link searches for the exact MW8991SB model..
Do not choose MW8991SB if you need a confirmed sensor-cooking cycle, a known turntable diameter, documented trim-kit fit, a stated commercial-duty class, separate input amperage or a precise cabinet footprint without checking the actual unit. The exterior is a stainless-steel front with a black cabinet, not all stainless.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact manual and specification sheet agree on 0.9 cu. ft. and 900 W output.
- Eleven power levels, six fixed presets, time/weight defrost, two-stage cooking, five memory settings and child lock give the controls useful flexibility.
- The exact-model finish is documented as a stainless-steel front with a black cabinet, and Office Depot classifies the model as countertop.
- The manual, manufacturer sheet and retailer record make the footprint uncertainty visible rather than relying on a generic listing title.
What to weigh up
- The manual and Office Depot list 20.1 W × 15.1 D × 11.2 H inches, while the manufacturer sheet gives a different approximate size of 19.1 W × 14.7 D × 11.5 H.
- The automatic recipe menus are not evidence of humidity-sensor cooking; sensor status remains unknown.
- No reviewed exact-model source supplies turntable diameter, separate input/amperage, trim-kit compatibility or a commercial-duty classification.
- Amazon's historical B0014E44S0 page returned an internal error, so the exact current ASIN/variant mapping remains unverified.
The key details
| Model covered | MW8991SB |
|---|---|
| Capacity | The exact MW8991SB manual and manufacturer specification sheet list 0.9-cu.-ft. capacity and 900-W cooking output at 120 V/60 Hz. |
| Microwave output | The manufacturer sheet describes a stainless-steel front with a black cabinet, not an all-stainless exterior; Office Depot's exact-model listing identifies countertop type and UPC 025806092592. |
| Cooking approach | Controls include eleven power levels, six preset recipes (popcorn, potato, pizza, frozen vegetable, beverage and dinner plate), time and weight defrost, two-stage cooking, five memory settings, a digital timer/clock and child lock. |
| Installation options | The owner manual lists outside dimensions of 20.1 W × 15.1 D × 11.2 H inches; the exact-model specification sheet gives approximate dimensions of 19.1 W × 14.7 D × 11.5 H. Office Depot's current item details match the manual, so verify the actual unit before a close fit. |
| Finish and turntable | Sensor cooking, turntable diameter, separate input/amperage, trim-kit compatibility and commercial duty are not established by the reviewed exact-model sources. The manual directs steady, flat placement and clear ventilation but does not state a built-in clearance or approve a trim kit. |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
The rated cooking specs are clear
The owner manual identifies MW8991SB as a 900-W microwave and lists 0.9 cubic feet in its specifications. Emerson's exact-model sheet repeats 0.9 cu. ft. and 900 W output. Office Depot lists 0.91 cu. ft., a rounded retailer figure that aligns with the manufacturer's nominal 0.9-cu.-ft. size. Keep the maker value as 0.9 and compare 900 W as cooking output; the sources do not give a separate input-amperage or input-wattage rating.
Presets are helpful, but they are not documented as sensors
The specification sheet lists six preset recipes: popcorn, potato, pizza, frozen vegetable, beverage and dinner plate. The manual documents eleven power levels, time and weight defrost, two-stage cooking, five memory settings, a timer/clock and child lock. Those are meaningful controls for everyday reheating and cooking, but neither exact source says the presets use a humidity sensor. Keep sensorCooking null rather than scoring it as present or absent.
Check the footprint on the specific unit
The manual lists 20.1 inches wide, 15.1 deep and 11.2 high, and Office Depot's exact MW8991SB listing agrees. The manufacturer sheet marks its dimensions approximate but reports 19.1 wide, 14.7 deep and 11.5 high. Because these are exact-model sources with different figures, confirm the appliance's label or measure it before buying for a close countertop opening. The reviewed material does not list the turntable diameter or a compatible trim kit.
Read the finish as a two-color cabinet
The exact-model manufacturer sheet says stainless-steel front and black finish cabinet. Office Depot lists both Stainless Steel and Black. A title that says Stainless Steel can hide the black cabinet sides, so check the full product appearance if the microwave will be visible from multiple angles.
Use the exact-model search until an ASIN is proven
The source row's historical Amazon ASIN B0014E44S0 returned an internal error, and the inspected model manual, specification sheet and Office Depot record do not map it to a current Amazon offer. The product remains in the verified roster because its model and countertop form are independently documented. Its Amazon destination searches for the full MW8991SB code and carries buyershortlists-20; it does not imply that the historical ASIN is current.
What else to compare
If sensor cooking, cabinet installation, a precise tray size, electrical input/amperage or an exact outside footprint is a must-have, compare models with an exact manual and manufacturer sheet that state those details. MW8991SB is easier to assess by its verified 0.9-cu.-ft. capacity, 900-W output, touch controls and two-tone finish than by unverified sensor or fit assumptions.
Before you buy
What are the verified capacity and output?
The exact MW8991SB manual and manufacturer sheet list 0.9 cu. ft. and 900 W output.
Is this a countertop microwave?
Yes. Office Depot's exact-model listing identifies countertop type; the manual directs steady, flat placement.
What color is the cabinet?
The manufacturer sheet specifies a stainless-steel front with a black cabinet.
Which cooking controls are documented?
Eleven power levels, six fixed presets, time/weight defrost, two-stage cooking, five memory settings, a timer/clock and child lock.
Does it have sensor cooking?
The manual and specification sheet do not say that the fixed presets use a sensor. Keep sensor status unknown.
What is the turntable diameter?
The sources identify a removable glass turntable but do not give its diameter.
What are the outside dimensions?
The manual and Office Depot list 20.1 W × 15.1 D × 11.2 H inches; the manufacturer sheet gives different approximate dimensions, 19.1 W × 14.7 D × 11.5 H. Verify the specific unit.
Does it have a compatible built-in trim kit?
No exact trim-kit compatibility was located. The manual directs flat, steady placement but does not state a kit or built-in path.
Is commercial duty documented?
No commercial-duty classification was found in the reviewed exact-model sources.
Does historical ASIN B0014E44S0 match the exact model?
The current Amazon page returned an internal error, so the exact ASIN mapping is unverified. Use the tagged MW8991SB search.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Emerson MW8991SB exact-model specification sheet, owner manual, and Office Depot model record ↗ — checked October 4, 2026.
- Emerson MW8991SB owner manual: exact model, 900-W model title, 0.9-cu.-ft. capacity, controls, flat placement, vent caution and outside dimensions ↗ — checked October 4, 2026.
- Exact MW8991SB manufacturer specification sheet: output, capacity, finish, controls, turntable, UPC and approximate dimensions ↗ — checked October 4, 2026.
- Office Depot exact-model listing: MW8991SB manufacturer number, countertop type, rounded capacity, finish, 900-W field, dimensions and UPC ↗ — checked October 4, 2026.
- Historical Amazon ASIN page returned an internal error and did not establish an exact current model/variant ↗Paid link · We may earn a commission. — checked October 4, 2026.
The decision
Emerson MW8991SB is a verified 0.9-cu.-ft., 900-W countertop microwave with eleven power levels, six fixed presets, time/weight defrost, two-stage cooking, memory and child lock. Its finish is a stainless-steel front with black cabinet. Sensor cooking, tray diameter, trim-kit fit, input amperage and commercial duty remain unknown. Manual and manufacturer-sheet exterior dimensions conflict, so verify the actual unit for a close fit. Historical ASIN B0014E44S0 is not verified; use the tagged exact-model Amazon search.
Is it the right fit?
Check the exact model and today’s offers on Amazon.