Second Chance Garmin Index Sleep Monitor S/M

Product information

Condition of this Second Chance product

Used for up to 3 months
Returned product in damaged original packaging
Complete with undamaged accessories/parts
Parts of the packaging have lost their print

Pros and cons

According to our heart rate sensor expert

You get a comprehensive insight into your sleep and can improve your night's rest.
The comfortable band is barely noticeable while you sleep.
The rechargeable battery of this sleep tracker lasts for 7 days.
You can see your sleep data in an app, so you need a smartphone or tablet.

Description

Get extensive insights into your sleep and improve your night rest with the Garmin Index Sleep Monitor S/M. With this arm band, you know how long you're sleeping for, when you're in which sleep phase, and how you breathe while you sleep. You can see all this information in Garmin Connect app on your smartphone or tablet. This sleep tracker is recommended for an upper arm circumference of 20 to 29cm. If you have a larger circumference, go for the L/XL. Your sleep data is combined into a sleep score. This way, you know how you slept. The sleep coach gives you advice on whether you need to catch up on sleep or go to bed earlier. The Garmin Index Sleep Monitor band is lightweight and comfortable, so you'll barely feel it on your arm. The band is also machine washable. The sleep tracker lasts for a week. When the battery is empty, charge it with the included cable.

The band of this sleep tracker is recommended for an upper arm circumference of 26 to 42cm.

Tips for using this product

This is what you get

Manual
Charging cable

Key specs

	Bluetooth
	ANT+

Show all specifications

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Most helpful reviews

Review is 9,5 out of 10.

Good alternative if you can't tolerate a heavy watch

Almost unnoticeable during sleep

Review by:
Pieter DG
Date:
12 February 2026
Translation:
Automatically translated from Dutch

Review is 8,5 out of 10.

Works well and better than sleeping with a watch.

Many times better than sleeping with a watch.
Alarm makes no sound
Ideally you don't sleep on the arm where the monitor is located, so that can sometimes be a bit difficult.

After a week, I'm still positive, and my main concern is sleep duration and waking up without an alarm; the vibration is strong enough to wake me up. You should take the rest of the data with a grain of salt, as that data can only be accurately determined in a sleep lab. What matters to me is the trends, primarily resting heart rate and sleep duration.

Review by:
JD
Date:
12 February 2026
Translation:
Automatically translated from Dutch

Specifications

Product

Product
	Product number	966537
	Manufacturer code	010-03024-01
	Brand	Garmin
	Warranty	2 years
	Processing of your defect	Via Coolblue

Physical properties

Physical properties
	Heart rate sensor detachable
	Standard battery type	Lithium-ion
	Water-resistant

Connectivity

Connectivity
	Data transfer function
	Compatible with operating system	Android, Windows Phone, iOS
	Bluetooth
	Bluetooth Smart
	ANT+

Sports functionalities

Sports functionalities
	Heart rate measurement under water

This is the one

Second Chance Garmin Index Sleep Monitor S/M

Review is 9,0 out of 10, based on 2 reviews.

Returned · Undamaged

Used for up to 3 months
Returned product in damaged original packaging
Complete with undamaged accessories/parts

anything for a smile

Ordered before 23:59, delivered tomorrow for free

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Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

This is what you get

Key specs

Reviews

Rating

Most helpful reviews

Good alternative if you can't tolerate a heavy watch

Works well and better than sleeping with a watch.

Specifications

Product

Physical properties

Connectivity

Sports functionalities

Related products

This is the one

Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

This is what you get

Key specs

Reviews

Rating

Most helpful reviews

Good alternative if you can't tolerate a heavy watch

Works well and better than sleeping with a watch.

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