Meet CALM: a smart wearable device that detects irregular heart rhythms using HRV analysis and measures your sleep quality. It weighs only 14 grams and comes with a medical grade gel pad. The chest strap is also adjustable, so you can wear it comfortably.
More items like this: here
The battery life lasts up to 3 days. You will be able to access and share your data from anywhere. iOS and Android devices are supported.
[Source]
*Disclaimer*Our articles may contain affiliate links. As an Amazon Associate we earn from qualifying purchases. Please read our disclaimer on how we fund this site.