Our take
GE's exact product page identifies PEM31SMSS as the 1.0-cu.-ft. Profile Spacemaker II and gives a 23 25/32-inch width, 11 3/16-inch height and 12 9/32-inch depth. GE's owner manual lists 800 W, ten power levels, humidity-sensor functions and a turntable switch that can stop rotation for large dishes. For the exact model, GE pairs PEM31SMSS with built-in kit JX827SMSS; its manual separately names hanging kit 04-A019. GE recommends a grounded outlet and excludes commercial use in its home-use warranty. The turntable diameter is not stated. Keep PEM31SMSS distinct from PEM31SFSS, which GE lists at 1.1 cu. ft. The current Amazon item details pair B000W3JHHM with model and manufacturer part number PEM31SMSS, while the page's canonical metadata points to PEM31SFSS/B01C8582Y0. The direct link follows the explicit item details, and this source conflict is disclosed.
The GE Profile Spacemaker II PEM31SMSS fits a countertop search for a smaller 1.0-cu.-ft. oven with documented sensor functions. GE lists 800 W in the owner manual and gives exterior dimensions of 11 3/16 × 23 25/32 × 12 9/32 inches. The manual includes Popcorn, Beverage, Reheat, Chicken/Fish, Potato and Vegetable sensor features and ten power levels. Its turntable can be switched off for a large dish, but the manual gives no tray diameter. GE identifies built-in kit JX827SMSS for PEM31SMSS and names a separate 04-A019 hanging kit for under-cabinet installation; neither accessory is an integrated feature, so check the kit instructions and opening before changing the installation. GE's warranty language excludes commercial use. This is not the 1.1-cu.-ft. PEM31SFSS model with the similar PEM31 prefix. On Amazon, B000W3JHHM's item details identify PEM31SMSS and the same ASIN, but the page canonical points to PEM31SFSS/B01C8582Y0. The direct item detail fields support the route; keep that canonical discrepancy in view..
Do not treat the countertop oven as commercial equipment. Do not assume a built-in or under-cabinet installation without the applicable separate kit and its instructions. If a specific plate needs to turn without touching the oven walls, check the actual turntable because GE does not publish its diameter. Confirm the exact model code if a 1.1-cu.-ft. PEM31SFSS is under consideration.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- GE lists a 1.0-cu.-ft. cavity, 800 W and 10 power levels for this exact model family.
- The manual documents humidity-sensor controls and a switch to stop turntable rotation for large dishes.
- GE lists the specific JX827SMSS built-in kit for PEM31SMSS and a separate under-cabinet hanging kit.
- The maker provides exact exterior dimensions for counter and shelf planning.
What to weigh up
- The turntable diameter is not specified, even though the manual lets users switch rotation off.
- Built-in and under-cabinet mounting require separate accessories and installation checks.
- The warranty language excludes commercial use.
- The 1.0-cu.-ft. PEM31SMSS is distinct from PEM31SFSS at 1.1 cu. ft.; Amazon's canonical metadata also points to that sibling model.
The key details
| Model covered | PEM31SMSS |
|---|---|
| Capacity | GE identifies exact model PEM31SMSS as a 1.0-cu.-ft. Spacemaker II and lists 11 3/16 H × 23 25/32 W × 12 9/32 D exterior dimensions. GE distinguishes it from the 1.1-cu.-ft. PEM31SFSS; the shared prefix does not make them aliases. |
| Microwave output | GE's owner manual lists 800 W output and power levels 1–10. The output is the cooking specification, not an electrical-input rating. |
| Cooking approach | Sensor menus include Popcorn, Beverage, Reheat, Chicken/Fish, Potato and Vegetable. The removable turntable can be stopped for large dishes, but GE gives no tray diameter. |
| Installation options | GE lists built-in kit JX827SMSS for PEM31SMSS and separately names hanging kit 04-A019. The manual requires a grounded outlet and recommends the oven's own outlet; its warranty excludes commercial use. |
| Finish and turntable | Amazon item details identify B000W3JHHM with model PEM31SMSS, but its canonical metadata points to PEM31SFSS/B01C8582Y0. The exact finish and turntable diameter remain undocumented. |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
PEM31SMSS is the 1.0-cu.-ft. model
GE names exact model PEM31SMSS as a 1.0-cu.-ft. Spacemaker II. Its comparison page also lists PEM31SFSS as a separate 1.1-cu.-ft. countertop model. The two codes share the PEM31 prefix but are not interchangeable aliases; check the full model label when matching capacity, case and installation parts.
800 W and ten power levels are documented
GE's owner manual lists 800 W and describes ten power levels. Its instructions explain that lower levels cycle microwave energy and can reduce the need to stir or rotate some foods. Treat the wattage as the documented output specification, not as a promise of cooking time for a particular dish.
Sensor menus use humidity released during cooking
The manual says the sensor features detect increasing humidity and adjust cooking time. It lists Popcorn, Beverage, Reheat, Chicken/Fish, Potato and Vegetable controls. GE advises using microwave-safe dishes with covers or vented wrap and keeping the dish and oven interior dry; it warns against repeating a sensor cycle on the same portion. These details make the feature more specific than an ordinary preset timer.
Turntable shutoff does not reveal the tray diameter
The removable turntable and support must be in place for normal use. GE lets the user turn rotation off for large dishes, which can help when an item is too wide to rotate. The manual gives no diameter, so it cannot establish the size of a plate that will rotate without contacting the interior. Measure a specific dish and verify the actual tray.
Cabinet mounting requires a separate kit
GE's accessory table directly pairs PEM31SMSS with built-in kit JX827SMSS. It separately names hanging kit 04-A019 for under-cabinet mounting. Measure the opening and follow the instructions for the selected accessory; countertop placement alone does not make the oven a built-in unit. Those are different accessory paths, so match the part number and its own installation instructions to the cabinet opening before ordering; a countertop placement fit does not establish a built-in fit.
GE specifies home use in its warranty
GE's warranty is for home use and excludes damage or failure from commercial use. Treat this as a household countertop microwave, not a restaurant-duty appliance. GE also recommends a grounded outlet and using the oven's own outlet to help prevent flickering or tripped protection. Buyers comparing household and foodservice equipment should treat that warranty limit as a duty boundary, since output wattage alone does not establish professional use.
What else to compare
For the 1.1-cu.-ft. version in GE's comparison, see separate model PEM31SFSS; its capacity is different from this PEM31SMSS. Verify its own feature and accessory records rather than transferring the JX827SMSS kit or this model's specifications based on their shared PEM31 prefix.
Before you buy
What capacity and output does GE list?
GE identifies PEM31SMSS as 1.0 cu. ft.; its owner manual lists 800 W.
Does it have sensor cooking?
Yes. The manual describes humidity-sensor functions including Popcorn, Reheat, Chicken/Fish, Potato and Vegetable controls.
Can the turntable be turned off?
Yes. GE says rotation can be switched off for large dishes; the manual does not state the tray diameter.
Which built-in trim kit does GE list?
GE pairs exact model PEM31SMSS with kit JX827SMSS.
Can it be mounted under a cabinet?
The manual lists hanging kit 04-A019 as a separate accessory for under-cabinet mounting.
Is PEM31SMSS the same as PEM31SFSS?
No. GE lists PEM31SMSS at 1.0 cu. ft. and PEM31SFSS at 1.1 cu. ft.; keep the model codes separate.
Does the manual give the turntable size?
No. It confirms a removable, switchable turntable but does not state its diameter.
Does Amazon ASIN B000W3JHHM match PEM31SMSS?
The current item's model and ASIN detail fields match, though Amazon canonical metadata names PEM31SFSS/B01C8582Y0. The discrepancy is disclosed in this entry.
Is the model intended for commercial use?
No. GE warranty language is for home use and excludes commercial use.
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.
- GE Appliances exact-model PEM31SMSS product page and owner manual ↗ — checked October 4, 2026.
- GE Appliances exact-model page: PEM31SMSS, 1.0-cu.-ft. model, exact exterior dimensions and owner-manual link ↗ — checked October 4, 2026.
- GE owner manual: 800 W, humidity-sensor features, ten power levels, turntable on/off, exact PEM31SMSS/JX827SMSS kit pairing, 04-A019 hanging kit and home-use warranty terms ↗ — checked October 4, 2026.
- GE Appliances direct comparison identifies PEM31SMSS as 1.0 cu. ft. and distinct PEM31SFSS as 1.1 cu. ft. ↗ — checked October 4, 2026.
- Current Amazon item details identify ASIN B000W3JHHM and model/manufacturer part number PEM31SMSS; canonical metadata points to the distinct PEM31SFSS/B01C8582Y0 ↗Paid link · We may earn a commission. — checked October 4, 2026.
- Search this model on Amazon · Tagged exact-model Amazon search retained as an alternate destination because of the canonical metadata mismatch ↗Paid link · We may earn a commission. — checked October 7, 2026.
- Amazon US model listing checked October 4, 2026; current condition, price, and availability are confirmed by the seller.
The decision
GE Profile PEM31SMSS is a 1.0-cu.-ft., 800-W household countertop microwave with humidity-sensor controls and a turntable that can be switched off. GE lists built-in kit JX827SMSS and separate hanging kit 04-A019; the manual does not give a tray diameter and the warranty excludes commercial use. Keep it distinct from the 1.1-cu.-ft. PEM31SFSS. The Amazon item details identify B000W3JHHM with PEM31SMSS, but canonical metadata points to the sibling PEM31SFSS/B01C8582Y0.
Is it the right fit?
Check the exact model and today’s offers on Amazon.