Our take
The DO400 suits shoppers who want a digital mode and timer workflow with a listed four-slice capacity. Its manual gives specific Bake, Broil, Toast, and Keep Warm settings, while leaving pizza fit and some operating limits unknown.
For shoppers who value documented digital settings and a four-slice class; verify cookware and counter dimensions..
Not for buyers who require a documented pizza diameter, measured bakeware fit, full convection instructions, or a verified current listing tied to the historical ASIN.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The manual documents four modes and separate digital control roles.
- Bake temperatures and Bake/Broil timer limits are stated.
- The guide supplies electrical details and two-inch spacing guidance.
What to weigh up
- The maximum Keep Warm duration is not stated.
- No pizza diameter, pan footprint, or cavity dimensions are published.
- A retailer convection field is not supported by the exact DO400 manual.
The key details
| Model covered | DO400 |
|---|---|
| Documented cooking modes | Bake, Broil, Toast, and Keep Warm |
| Published food-fit reference | Four-slice listing; pizza diameter and pan fit unknown |
| Controls and timer | Digital mode, temperature, time, and toast-shade controls |
| Placement and electrical notes | 120 V / 60 Hz / 1,400 W; two-inch countertop spacing |
| Source and variant boundary | Exact DO400 sources; no Convection procedure or ASIN mapping |
Performance figures are manufacturer claims. Source checked October 1, 2026. Regional models and included accessories can differ.
What the features mean for you
A digital panel separates the main decisions
The DO400's exact-cover owner manual and exact-code records identify a digital toaster oven. The MODE button selects Bake, Broil, Toast, or Keep Warm. Temperature selection is separate from TIME and TOAST COLOR controls, which serve different purposes depending on the selected mode. This organization can help a buyer who prefers direct button choices over multiple mechanical dials. The saved records describe four-slice capacity, but they do not give a pizza diameter, measured pan dimensions, or cavity size. Keep that distinction in mind when translating a slice label into the actual dishes you use.
Bake, Broil, and Keep Warm are not identical
For Bake, the manual lists ten settings from 200°F to 450°F and a timer that reaches two hours. Broil has a separate one-hour timer limit. Keep Warm is fixed at 180°F, but its maximum duration is not published. Those limits matter when choosing a mode for a short or longer recipe. The manual's named procedures support the four-mode profile; a separate retailer field says convection, but the exact DO400 guide gives no convection control or instructions. This review therefore leaves convection out of the confirmed feature list.
Toast uses fresh and frozen shade choices
The guide describes fourteen Toast shade selections, split between seven fresh-bread settings and seven frozen-bread settings marked FR. Toast uses an automatic countdown adjusted by the oven thermostat. This is more specific than simply saying the oven has a timer: the control changes with the selected mode, and the manual ties Toast to its own shade program. The source does not publish an overall toast capacity beyond the exact-code four-slice listing. It also does not state a physical rack layout, so shoppers should avoid treating a historical title as a detailed load diagram.
Use outside dimensions and clearance for separate checks
Best Buy's archived exact-code record lists outside measurements of 8 inches high by 16 inches wide by 11.3 inches deep. Those are exterior dimensions, not the cavity opening or a bakeware fit. The DO400 manual asks for two inches from walls or nearby countertop objects and calls for a grounded three-pin outlet. Its electrical rating is 120 V, 60 Hz, and 1,400 W. Compare the body size and the spacing rule with the intended counter independently; one cannot substitute for the other. No finish is confirmed by the saved exact-code packet.
The model search does not resolve old offer identity
The frozen row's historical ASIN is not mapped to a current seller listing. This page uses an exact DO400 Amazon search destination with the affiliate tag so buyers can check current results themselves. The product evidence supports the model, digital workflow, four-slice class, electrical rating, and published outside dimensions. It does not support a current price, stock status, customer rating, or seller-specific bundle. A comparison should therefore focus on the documented operating choices and leave current offer details to the destination page.
What else to compare
Compare Cuisinart TOB-1010MB when a published pizza fit and manual physical controls matter, or Cuisinart TOB-60N when the feature list and source limits differ.
Before you buy
Which modes does the exact DO400 manual name?
It documents Bake, Broil, Toast, and Keep Warm with different digital control steps.
What Bake and Broil limits are stated?
Bake lists ten settings from 200°F to 450°F and a two-hour timer; Broil's timer reaches one hour.
Does the exact manual document Convection?
No. A retailer data field says convection, but the DO400 operating guide has no convection mode or procedure.
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.
- De'Longhi DO400 owner manual ↗ — checked October 1, 2026.
- DO400 owner manual ↗ — checked October 1, 2026.
- Exact-code De'Longhi parts and product record ↗ — checked October 1, 2026.
- Archived Best Buy DO400 model record ↗ — checked October 1, 2026.
The decision
Consider DO400 when the digital mode workflow is a priority. Confirm the exact dish fit separately because the sources do not publish a pizza size or measured cavity opening.
Is it the right fit?
Check the exact model and today’s offers on Amazon.