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Every starter kit includes the BKT TD-4279 meter, a lancing device, lancets, test strips (glucose, ketone, or both depending on your kit), a carrying case, batteries, and a quick-start guide. Everything you need to start testing right out of the box.

Yes. The BKT TD-4279 is FDA-cleared for over-the-counter blood glucose and ketone testing. No prescription required.

Intended Use: This Best Ketone Test Ketone and Glucose Meter is intended for the quantitative measurement of glucose in fresh capillary whole blood from the finger, and for the quantitative measurement of β-Ketone (beta-hydroxybutyrate) in fresh capillary whole blood from the finger. The system is intended for in vitro diagnostic use and for single-patient use as an aid to monitoring the effectiveness of a diabetes control program. The system should not be used for the diagnosis of, or screening for, diabetes, nor for use on neonates.

No, only BKT TD-4279 glucose and ketone test strips.

These are compatible test strips for both the original Keto-Mojo TD-4279 meter and the BKT TD-4279 meter. Make sure your meter matches the image below.

Every new box of ketone test strips includes a small ketone code strip — also called a code chip — that programs your meter to read that specific batch accurately. You'll need to code your meter every time you open a new box.

Where to find it

The code strip (code chip) is inside the ketone strip box, between the strip vial and the instruction sheet.

How to code your meter

1. With the meter off, insert the code strip (code chip).
2. Wait for the code number to appear on the display.
3. Check that the code on the display matches the code printed on your strip vial — they should be identical.
4. Remove the code strip. The meter will display “OK” — your meter is now coded for this box.

You only need to do this once per box. Every strip from that box will use the same code.

If the codes don't match

Stop and repeat the coding steps above. Testing with a mismatched code will give you inaccurate readings. If the codes still don't match after a second try, the code strip (code chip) may be expired or damaged — contact us at care@bestketonetest.com with your order number and we'll send a replacement.

Do I need to code my meter for glucose strips?

No. Coding only applies to ketone strips. Glucose strips don't require a code strip or code chip.

BKT blood ketone strips measure beta-hydroxybutyrate (BHB) directly in your blood, which is the most accurate and reliable way to track ketosis. Urine strips measure acetoacetate, a byproduct that becomes less detectable as your body adapts to ketosis — so they get less useful over time. Breath analyzers measure acetone and can vary with hydration and breathing patterns. For precise ketone levels, blood testing with BKT strips is the gold standard.

No. Each BKT test strip is single-use and should be discarded after testing.

Store in a cool, dry place. Keep strips in the original vial with the cap tightly closed. Do not use strips past the expiration date printed on the vial.

Each BKT test strip requires just 1.0 µL — a tiny drop from a quick fingertip prick.

The BKT TD-4279 exceeds strict FDA accuracy standards: ±15 mg/dL for glucose readings at or below 100 mg/dL, and ±15% for readings above 100 mg/dL. Ketone precision is CV < 7.5% for readings above 1 mmol/L.

With the BKT TD-4279, glucose results appear in 5 seconds and ketone results in 10 seconds. Both require just 1.0 µL of blood — a tiny drop from a quick fingertip prick.

The included lancing device has adjustable depth settings so you can find the most comfortable level for your skin. Most users describe it as a quick, mild pinch that's over in a second.

Yes. All BKT starter kits ship free within the U.S. We also ship to Canada and internationally.

Yes. BKT products are also available on Amazon U.S. for your convenience. You can find our full range of starter kits and test strips there.

Yes. BKT meter kits and glucose test strips are FSA/HSA eligible, so you can use your pre-tax health savings to purchase. Ketone test strips may also be eligible depending on your specific plan — check with your FSA/HSA provider for details.

BKT glucose test strips are FSA/HSA eligible. BKT ketone test strips may also be eligible depending on your plan — check with your FSA/HSA provider.

Yes. The BKT TD-4279 connects via Bluetooth to the BKT Health app, available on the Apple App Store and Google Play Store. Use it to log readings and track your progress over time.

The BKT TD-4279 stores up to 1,000 readings with date, time, and testing mode. You can also review day averages across 7 to 90-day windows, broken out by before-meal, after-meal, and general readings.

E-b appears when the battery is too low to perform a test. Replace both AAA alkaline batteries immediately.

E-2 appears when the test strip or code chip is expired. Check the expiry date of the strip and repeat with a new lot if necessary. Also verify the date set on your meter is correct.

E-U appears when a used test strip is inserted. Discard it and repeat with a new test strip.

E-t appears when ambient temperature is above or below the system operation range of 10°C to 40°C (50°F to 104°F). Move to a room-temperature environment and repeat the test after the meter and strips are within range.

E-F appears when the test strip is removed while counting down, or when there is insufficient blood volume. Review the instructions and repeat the test with a new strip.

These codes indicate a problem with the meter. Repeat the test with a new test strip. If the meter still does not work, contact BKT Customer Support at care@bestketonetest.com.