Our take
Oster OGM4901 is a 0.9-cu.-ft. countertop microwave with 900-W microwave output and 1,350-W power consumption. Its manual specifies a grounded 120-V/60-Hz/20-A supply and recommends a separate circuit. The control list includes quick-cook buttons, multi-stage operation, Cook by Weight, Defrost by Weight, Speed Defrost, adjustable power and an independent timer. A glass tray and roller ring are documented without a diameter. The manual also specifies 8 in. above, 4 in. behind and 2 in. at each side. This is a broad manual-control set for a compact oven, with explicit electrical and placement requirements.
Consider OGM4901 for a compact oven with adjustable power and weight-based cooking if the recommended grounded 20-A separate circuit is available. Reserve 8 in. overhead, 4 in. behind and 2 in. at the sides. Do not assume an ordinary shared outlet or cabinet trim installation is suitable..
Choose another model if a recommended grounded 20-A circuit and stated clearances are unavailable, or if sensor cooking, a trim kit or a verified tray diameter is required.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact manual identifies 900-W output separately from 1,350-W electrical consumption.
- Grounded 120-V/60-Hz/20-A supply and a separate-circuit recommendation are stated.
- Weight-based cooking and defrost, multi-stage operation, adjustable power and explicit clearances are documented.
What to weigh up
- The 0.9-cu.-ft. cavity may not suit large dishes and the turntable diameter is unstated.
- Sensor cooking and trim-kit fit are not established by the reviewed manual.
- The warranty language does not amount to a formal commercial-duty classification, and the old ASIN failed recheck.
The key details
| Model covered | OGM4901 |
|---|---|
| Capacity | The OGM4901 manual lists a 0.9-cu.-ft. countertop cavity. |
| Microwave output | The manual separates 900-W microwave output from 1,350-W power consumption. |
| Cooking approach | Quick cook, multi-stage cooking, weight-based cooking and defrost, speed defrost, adjustable power and an independent timer are listed; sensor status is unknown. |
| Installation options | The manual specifies a grounded 120-V/60-Hz/20-A supply and recommends a separate circuit; countertop clearances are 8 in. above, 4 in. behind and 2 in. at each side. |
| Finish and turntable | The model is Oster OGM4901; finish and tray diameter are not given. No trim kit or formal commercial-duty classification is established. |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
What the features mean for you
Keep the exact Oster identity
The Oster-branded manual names OGM4901 and identifies it as a countertop microwave. Its copyright and distributor notes mention Sunbeam/Jarden and Galanz, but they do not create a new model alias or justify borrowing features from a different Galanz oven. Keep the catalog brand and model as Oster OGM4901. The historical Amazon page B00BEXSPWW returned an error during the saved check, so the exact name alone does not support a direct ASIN link.
Separate cooking output from the wall draw
The manual lists 900 W microwave output and 1,350 W power consumption. It separately calls for grounded 120 V/60 Hz at 20 A and recommends a separate circuit. Output is appropriate for comparing published microwave ratings; consumption and current are for electrical planning. Check the nameplate and available circuit rather than assuming a standard shared outlet is sufficient. No wiring change or performance result is inferred from these specifications.
Use the controls that fit the cooking routine
The manual names quick-cook buttons, adjustable power, multi-stage cooking, an independent timer, Cook by Weight, Defrost by Weight and Speed Defrost. These functions let users choose lower power or plan more than one stage instead of relying only on a full-power cycle. The manual does not establish humidity sensor cooking, so the profile leaves that field unknown. Weight-based presets are not interchangeable with a sensor cycle; buyers who require sensing should choose a model documented for it.
Reserve ventilation before placing the oven
The manual calls for a stable counter, eight inches above, four inches behind and two inches at each side. The body measures about 19 W × 14 1/8 D × 11 1/16 H inches and weighs about 30 lb. Allow the stated airflow space in addition to the footprint; a shelf that fits the body but blocks vents is not adequate. The manual gives a tray and roller ring without diameter and does not list a trim kit.
Do not overread household warranty wording
The warranty limits repair coverage for uses other than normal single-family household use, but the reviewed manual does not expressly classify OGM4901 for commercial foodservice. Keep commercialDuty unknown instead of converting warranty terms into a formal duty rating. The old Amazon page also failed recheck, so the tagged exact-model search is used. Confirm OGM4901 on a listing and unit label, then check circuit and clearances; current stock and price are not asserted.
What else to compare
Before you buy
What is the microwave output?
The OGM4901 manual lists 900 W output separately from 1,350 W power consumption.
What electrical supply does it require?
The manual calls for grounded 120 V/60 Hz at 20 A and recommends a separate circuit.
Does it have sensor cooking?
The reviewed manual does not establish sensor operation for OGM4901.
How much ventilation space is specified?
The instructions call for eight inches above, four inches behind and two inches at each side.
Does the historic ASIN support a direct link?
No. B00BEXSPWW returned an internal error; the tagged model search is used instead.
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.
- Oster-branded GLZ100918 exact OGM4901 user manual ↗ — checked October 5, 2026.
- Oster-branded OGM4901 manual checked 2026-10-05; identifies the exact model and documents capacity, output/input, supply, controls and clearances. ↗ — checked October 5, 2026.
The decision
Oster OGM4901 is a 0.9-cu.-ft. countertop microwave with 900-W microwave output and 1,350-W power consumption. Its manual specifies a grounded 120-V/60-Hz/20-A supply and recommends a separate circuit. The control list includes quick-cook buttons, multi-stage operation, Cook by Weight, Defrost by Weight, Speed Defrost, adjustable power and an independent timer. A glass tray and roller ring are documented without a diameter. The manual also specifies 8 in. above, 4 in. behind and 2 in. at each side. This is a broad manual-control set for a compact oven, with explicit electrical and placement requirements.
Is it the right fit?
Check the exact model and today’s offers on Amazon.