My unit used to work, but now despite buying two other new tubs of strips all I get is E4. Any ideas?

Maybe you need to check the batteries. I don't know if this product has a QC (quality control) mode but we have this on our machines in hospitals. We perform QC checks to see that our machines always work. Hope this helps.

The strips for this are not available at the moment; are there any other brands of strips that are compatible with this device?

Unfortunately, due to the current circumstances things are taking slightly longer than usual. We are expecting to have stock in 3-6 weeks.

Does it come with a sim card that fits to side of monitor?

Each tub of test strips (whether they be Ketone or Glucose strips) come with their own chip (but it's not a "SIM" card as they go in mobile phones right?)

Do you need the ketone chip? As I can't find it anywhere to buy for your product. And it is not included in package.

The code chip is included in the On Call Ketone Test strips. These are not included with the meter.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Glucose and Ketone Meter (excl. test strips, lancets, lancing device)

Product ID: 48379548

Details

Battery cell composition
Alkaline
Brand
ON CALL GK
Included components
digital-meter
Model name
Blood Glucose
Number of items
1

📊Dual glucose & ketone tracking

📖Includes detailed instruction manual

🔋Alkaline battery powered

€ 30.62

Duties & taxes included

In stock

Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📈 Stay ahead of your health curve with dual-action monitoring!

COMPACT PORTABLE - Lightweight design fits perfectly in your professional lifestyle on the go.
CUSTOMIZABLE TESTING - Compatible with On Call Chosen glucose and ketone test strips for tailored accuracy.
DUAL FUNCTION PRECISION - Seamlessly monitor both glucose and ketone levels with one sleek device.
UPGRADE YOUR HEALTH GAME - Replacement meter pack ensures you never miss a beat in your metabolic tracking.
BATTERY READY CONVENIENCE - Comes with reliable alkaline batteries for immediate use—no extra trips needed.

The On Call GK Dual Meter is a replacement digital device designed for precise blood glucose and ketone monitoring. Powered by alkaline batteries and accompanied by a comprehensive instruction manual, it requires separate purchase of On Call Chosen test strips and lancets. Ideal for professionals seeking reliable, dual-function metabolic tracking in a compact form.

Specifications

ASIN	B0196U6MVA
Battery Cell Composition	Alkaline
Best Sellers Rank	71,343 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 73 in Ketone Testing & Monitoring
Brand Name	ON CALL GK DUAL
Country of Origin	China
Customer Reviews	4.1 4.1 out of 5 stars (107)
Included Components	digital-meter, batteries, instruction manual
Model Name	Blood Glucose and Ketone Meter
Number of Items	1
Number of Packs	1
Unit Count	1.0 count

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