How safe is a sticker to use it as a thermometer for baby shower?

Good Day Everyone.

I am curious about the safety side of using Estimote sticker as a thermometer.
The idea is using a temperature app to measure water temperature of a baby shower.
Does this use case harm the baby? Does Bluetooth broadcast signals affects baby’s body?

Please let me know about the possible security issues.

I’d be more worried about the sticker surviving the bath :slight_smile:

The battery is low voltage, and Bluetooth radio waves are the general 2.4 GHz radio waves that we’re all exposed to constantly these days, so I don’t imagine there’s any safety issues here. But I’m no expert by any means, so please consult with a professional (a doctor?) for any guarantees.