The SM4Bat is only intended for use with ultrasonic microphones and our cabled hydrophone, not sonic microphones. The SM3Bat has the ability to record with either sonic or ultrasonic microphones if your application requires this.
Wildlife Acoustics, Inc.
3 Mill and Main Place, Suite 110
Maynard, MA 01754-2657 USA
+1 (978) 369-5225
+1 (888) 733-0200