If you have any product in the SM3 or SM4 line and it will not turn on, please check/try the following:

• Install brand new alkaline D batteries.
• Make sure the power switch is in the correct position (down for internal power).
• Press and hold the "Stop Program" button for a couple of seconds.

• 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 iOS devices are compatible with my Echo Meter Touch module?
• 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 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?
• View more questions