MyPetzl Light is a free Android app developed by Petzl that allows you to easily customize the performance of your Petzl, REACTIK + or NAO + headlamp. With Bluetooth Smart functionality, you can instantly check the remaining burn time, activate a preset profile or customize your own to fit your activity, and adjust the brightness of your lamp.

The app provides real-time information on your lamp's status, including battery charge level, remaining burn time, and the headlamp profile currently active. You can choose from several lighting profiles available for each activity, such as multiactivity, trail running, trekking, mountaineering, and backpacking. You can also create your own lighting profiles and adjust the lighting levels according to your needs.

The LIVE mode allows you to control the headlamp from your mobile device with Bluetooth Smart, giving you real-time adjustment of brightness and burn time. Additionally, the app has an emergency light signal feature that converts a brief message on your smartphone to a light signal when there is no cell reception.

Overall, MyPetzl Light is a convenient and practical app for outdoor enthusiasts who want to customize their headlamp's performance to their specific needs.