iPhone Screenshots


Musical instruments can be easily damaged by large and rapid changes in humidity and temperature. Now you can protect your investment by simply placing TKL's Safe & Sound sensor with Blustream Technology inside your case.

Safe & Sound uses a patented Bluetooth sensor to provide a constant stream of temperature, humidity, impact, motion, and proximity data to the free smart phone app to alert you of hazardous conditions that can lead to diminished playability, costly repairs, and lost value of your instrument. When your Safe & Sound sensor detects dangerous conditions, notifications are sent to all your devices allowing you to take corrective action before damage occurs.

To completely protect your instrument from the damaging effects of humidity, reorder your favorite humidity protection system directly through the app.

Find out more about Safe & Sound at https://tkl.blustream.io/.

What’s New

Version 1.5.9

This release includes minor UI improvements.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

MyCool Beernutz ,

This is what I needed with my TKL case!

Once I linked the sensor to my phone ,which was a total walk in the park. I was able to see an alert that my case was hearting up to a dangerous level, because I left it in my car. Total Baby Saver!


TKL Products Corp.
64.9 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2019 Blustream Corporation


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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