The short version
- A 60-minute analog-style timer, 3.47 × 3.47 × 2.05 in and 3.52 oz, that runs silently on one AA battery (not included) and has an end-of-time beep you can switch off.
- $19.95 on Sep 30, 2026 for Fern Green, sold and shipped by Amazon.com.
- It counts down up to one hour only; for longer blocks you reset it, and the silicone color cases shown in some photos are sold separately.
The first work block after you sit down, from around nine.
Set on the desk to mark a work block and the break after it.
Not used at this time of day, unless you borrow it for a kitchen task.
Not used at this time of day.
What the spec shows
Specs come from the Amazon listing for ASIN B0BK2J71M1 (bullets and product details) and the Time Timer MOD Home Edition product page, both read on Sep 30, 2026.
| Spec | Value | What to know |
|---|---|---|
| Range | Up to 60 min | The dial is marked in minutes from 0 to 60. |
| Display | Colored disk | The Fern Green body comes with a green disk that shrinks as time runs out. |
| Sound while running | Silent | Time Timer describes it as completely silent, with no ticking. |
| Alert | Beep, optional | A gentle beep at zero that can be turned off for a purely visual timer. |
| Power | 1 × AA, not included | Buy a battery with it. |
| Size | 3.47 × 3.47 × 2.05 in | Small enough for a crowded desk or a shelf. |
| Weight | 3.52 oz | Per the listing's product details. |
| Covers | Sold separately | Removable silicone cases in other colors are an add-on, not in the box. |
| Model | TTM9-HFG-W | The part number for the Fern Green Home MOD. |
| Warranty | 1 year | The listing states a one-year manufacturer warranty; the maker page describes a one-year satisfaction guarantee. |
How it holds up in use
According to Time Timer's instruction sheets, you set it by turning the center knob counter-clockwise to the number of minutes you want; it starts counting down immediately, with no start button, and the colored disk shrinks steadily back toward zero [4]. The point of the design is that you can read the remaining time from across the desk without looking at numbers: a quarter circle left is fifteen minutes, a sliver is nearly done. Because it is silent while running, it suits shared offices, libraries and quiet rooms. An on/off switch on the back controls the alert; when it is on, the older instruction sheet describes four rounds of a quick double beep at zero, and when it is off, nothing sounds.
The one-hour maximum is the main limit. That fits the common pattern of a focused block followed by a short break, but anyone who works in 90-minute stretches will need to reset it partway through. The Amazon listing spends much of its text on classroom and learning-support uses; we describe it simply as a visual countdown, and make no claims about attention or concentration.
For desk days, the timer is most useful as a reminder to stand up. The US Physical Activity Guidelines advise adults to move more and sit less through the day, alongside at least 150 to 300 minutes a week of moderate activity [1]. Research on how often to break up sitting is still early: a small 2023 lab crossover trial in 11 middle-aged and older adults compared several schedules of light walking breaks during an 8-hour seated day and found that some schedules changed short-term blood sugar and blood pressure readings compared with sitting throughout [2]. That is a small, short study of a habit, not evidence about any timer.
Remember the AA battery, and check whether you want the silicone cover in the photos, since it is sold separately. If you need to time blocks longer than an hour, or want a timer with a digital readout, this is not the right model.
How to fit it into your day
A plain sequence for using the timer to mark work blocks and breaks. Pick the lengths that suit your work.
Set it up once
Fit a good-quality alkaline AA battery (if your unit's battery compartment has a small screw, you need a mini Phillips screwdriver; Time Timer says rechargeables work but may run down faster), set the alert switch on the back, and put the timer where you can see it without turning your head.
Start the first block around 09:00
Choose one task, turn the knob counter-clockwise to the block length you want (up to 60 minutes), and work until the disk is gone.
Turn the break into a short walk
When it reaches zero, set 5 minutes and stand up: refill a water bottle, walk to a farther room, or step outside. Our habit note on walking breaks has more ideas.
Repeat through the afternoon until around 17:00
Alternate blocks and breaks, taking a longer break at lunch. Stop using it at the end of the working day so it stays a work cue.
Price and where it is sold
On Sep 30, 2026, the Amazon listing for the TIME TIMER Home MOD in Fern Green showed $19.95, in stock, shipped and sold by Amazon.com, with a free 30-day refund or replacement window. The listing is here: amazon.com/dp/B0BK2J71M1. Time Timer's own site listed the MOD Home Edition at $24.95 the same day. Other colors are separate listings.
Who should look elsewhere
- Anyone who works in blocks longer than an hour: the dial stops at 60 minutes.
- Anyone who wants a built-in rechargeable timer: this runs on an AA, and Time Timer recommends alkaline cells, noting rechargeables may run down more quickly.
- Anyone for whom concentration or overwhelm at work is a persistent problem should talk to a clinician; a timer is a household tool, not care.
Sources
- US Office of Disease Prevention and Health Promotion. Physical Activity Guidelines for Americans, 2nd edition: top 10 things to know. Accessed Sep 30, 2026. link
- Duran AT, Friel CP, Serafini MA, Ensari I, Cheung YK, Diaz KM. Dose-response analysis of a randomized crossover trial of breaking up prolonged sitting (title paraphrased). Med Sci Sports Exerc. 2023;55(5):847–855. PMID 36728338. link
- Time Timer. MOD Home Edition product page: size, battery, silent operation, optional alert, colors, price. Accessed Sep 30, 2026. link
- Time Timer. "Getting Started with Your Time Timer MOD" user guide (2020) and the older "Time Timer MOD Instructions" sheet, PDFs hosted on Amazon: setting, alert switch, batteries, care. (files 819SXI4OqiL.pdf and 61pptEH5isL.pdf). Accessed Sep 30, 2026.
- Amazon.com. Listing for TIME TIMER Home MOD, Fern Green (ASIN B0BK2J71M1): bullets, product details, price, seller, return window. Accessed Sep 30, 2026.
This entry describes a product and is not medical advice. If sleep, energy, focus or physical discomfort is a persistent concern, talk to a qualified clinician; a household product is not a substitute for care.