The Song Meter SM4 has not been tested to record below 20Hz, but anecdotally we have heard customers doing so to record elephants, rhinos, etc. We do not recommend the Song Meter Mini nor the Micro for infrasonic projects. These models employ fixed high-pass filters and will not record useable signals below 20 Hz. With the SM4, the HPF can be turned off.

• Why can't I use an adapter to connect a USB-C Echo Meter Touch to my Lightning iOS device?
• What type of plug does my Echo Meter Touch module have?
• What type of data port does my phone or tablet have?
• Can I use Echo Meter Touch modules with USB connectors with iOS devices?
• What iOS devices are compatible with my Echo Meter Touch module?
• What adapter do I need for my Echo Meter Touch module and Android or iOS device?
• How do I update the firmware on my Echo Meter Touch module with USB to add iOS compatibility?
• Are there acoustic differences between the first- and second-generation Mini Bat recorders?
• Will the Lithium-ion lids I used with first-generation Minis fit the new models?
• Will the security bracket accessory I use with first-generation Minis be compatible with the new models?
• Will Wildlife Acoustics continue to repair and support first-generation Minis with replacement parts?
• Are there size differences between the first- and second-generation Minis?
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