WAV Trigger TX RX 3.3v with Teensy LC

Sensors Sound & Audio
1

Is there a jumper for 3.3v serial communication on the WAV Trigger so I don’t damage my Teensy LC?

2

The WAV Trigger is also a 3.3V device - its’ inputs just happen to be 5V tolerant. The WAV Trigger’s TX output is 3.3V.