Breville USA RM-BMO870BSS1BUC1 Breville RM-BMO870BSS
- Countertop Microwave Oven
- 1.1 cu ft
- 1400 watts
- Push button, Knob
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How it ranks among the 85 countertop microwave ovens we track
4.3★ across 50 Amazon ratings, Bayesian-smoothed toward the category average.
50 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 85 countertop microwave ovens we track - how the scorecard works · full countertop microwave ovens data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 13, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This is a Breville-certified renewed Combi Wave 3 in 1, combining an air fryer, convection oven and inverter microwave in one countertop unit, backed by a six-month Breville warranty instead of the full new-unit coverage.
Breville's Element iQ system automates power distribution across functions, and the Power Smoothing Inverter replaces old on-off microwave cycling with steady, adjustable power for reheating and defrosting. Being a renewed unit, it should show limited or no wear and include the original accessories, but the warranty window is shorter than buying new.
- Air fryer, convection oven and inverter microwave combined
- Element iQ automatically steers power across functions
- Fast Combi and Cook From Frozen presets
- Breville-certified renewed with six-month warranty
Who it's for
Suits kitchens wanting to replace a microwave, toaster oven and air fryer with one connected appliance, and buyers comfortable with a manufacturer-renewed unit's shorter warranty. Not for anyone who wants to select combi cooking functions directly rather than through named food presets.
What buyers say
From Amazon customer reviews.
Owners who replaced older or competing microwaves call the build quality and inverter heating a clear step up, pointing to the soft-close door and stainless interior as details other brands skipped. The most detailed negative review says the combi oven-and-grill mode can only be reached by picking a preset food like chicken rather than choosing functions directly, that there is no self-clean cycle, and that the microwave engages to preheat several baking functions, which one buyer said roughly doubled air-fry cook times. A separate reviewer agreed the microwave and oven outperform the air fryer, calling that function slow.
Strengths and trade-offs
Drawn from this product's published specifications.
- Combines microwave, oven and air fryer in one unit
- Inverter microwave gives steadier, more even reheating
- Soft-close door and stainless interior praised by owners
- Combi functions reachable only through preset food menus
- No self-cleaning function
- Preheating step limits cookware choice for some bakes
- Air fryer function called slow by some owners
Performance notes
The Power Smoothing Inverter adjusts microwave output continuously rather than cycling full power on and off, which reviewers credit for more even reheating and defrosting. Fast Combi alternates convection, grill and microwave to speed up cooking, though one reviewer found the combi settings are only reachable through named food presets like chicken rather than a direct oven-plus-grill selection, and that the microwave engages to preheat certain baking functions.
Specifications
| Brand | Breville USA |
|---|---|
| Model | RM-BMO870BSS1BUC1 |
| Dimensions & fit | |
| Item Weight | 34 pounds |
| Item Dimensions D x W x H | 20.1 × 20.5 × 12.6 inches |
| Capacity & performance | |
| Capacity | 1.1 cu ft |
| Defrost System Type | Defrost |
| Heating Method | Convection, Electric |
| Power & efficiency | |
| Wattage | 1400 watts |
| Number of Power Levels | 19 |
| Voltage | 120 volts |
| Construction & materials | |
| Material Type | Stainless Steel |
| Inner Material | Brushed Stainless Steel |
| Color | Brushed Stainless Steel |
| Compatibility & installation | |
| Installation Type | Built-In |
| Human Interface Input | Buttons |
| Included components | |
| Unit Count | 1 |
| Included Components | Combi Crip Pan, Instruction Booklet, Trivet |
| Warranty & support | |
| Warranty Description | 6 months |
| Other details | |
| Control Type | Push button, Knob |
| Number of Programs | 19 |
| Cooking Program | Air Fryer, Convection Oven, Inverter Microwave |
| Timer Function | Timer Function Available |
| Item Type Name | Breville RM-BMO870BSS, the Combi Wave 3 in 1 |
| Additional Features | Child Safety Lock |
| Recommended Uses For Product | Meat |
How it compares
This product against the closest alternatives we track in countertop microwave ovens.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Breville USA RM-BMO870BSS1BUC1 Breville RM-BMO870BSSThis product | 4.3 / 5 | 50 | 3.9 / 5 |
| COMFEE' EM720CPL-PMB Countertop Microwave Oven with Sound On/OffCOMFEE' | 4.4 / 5 | 28,000 | 4.4 / 5 |
| Panasonic Microwave Oven NN-SN686S Stainless Steel Countertop/Built-In with Inverter…Panasonic | 4.3 / 5 | 8,400 | 4.4 / 5 |
| Nostalgia RMO4BK Retro 0.9 Cubic Foot 800-Watt Countertop Microwave OvenNostalgia | 4.6 / 5 | 1,200 | 4.4 / 5 |
| TOSHIBA EM131A5C-BS Countertop Microwave Ovens 1.2 Cu FtTOSHIBA | 4.4 / 5 | 32,299 | 4.3 / 5 |
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Questions about the Breville USA RM-BMO870BSS1BUC1
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What is included in a Breville-certified renewed Combi Wave?
It ships with all original accessories and shows limited or no wear, backed by a six-month Breville warranty.
Can I run the oven and grill together without picking a food preset?
One detailed reviewer reported the combi function is only accessible through named food presets, not as a direct function combination.
Does the microwave function work well for reheating?
Yes, several reviewers highlight the inverter technology for smooth, even reheating and defrosting compared to standard microwaves.