The microphone itself utilizes DSP echo cancellation, so you won't have to worry too much about your callers hearing themselves, but road noise can be a bit of an issue depending on how well-insulated your vehicle is and the final placement of the MotorMouth II in the cabin. Callers were aware of the fact that our test calls originated from a moving vehicle, but they almost never complained about not being able to hear us properly. Of course, with four speakers pumping out our end of the call, we heard our side of the conversation loudly and clearly.
Along the spine of the unit is a tiny pinhole connection for the included USB charging cable adapter. We're not a fan of such proprietary connections, as they make finding replacement chargers and cables difficult. The MotorMouth II also ships with a low-profile USB-to-12-volt adapter for charging in-car. Scosche claims a combined 5-hour talk and audio streaming time or standby time of up to 150 hours from a 2-hour charge.
For those who want to continue using a vehicle's aux-in for connecting auxiliary audio sources, Scosche has included an audio splitter. Finally, for owners of vehicles with auxiliary inputs located in the center console or glovebox, the MotorMouth II includes an auxiliary relocation cable that terminates in a sort of microphone stand that can be attached to the dashboard via double-sided tape, a pair of screws (included), or both.
The MotorMouth II is meant to be used in an automotive environment, but we were able to make use of the device with any audio input that accepted a headphone-jack-sized microphone input, including a laptop computer, for receiving calls while working. For in-car applications that feature a dashboard auxiliary input, we think the Scosche MotorMouth II is a neat hands-free calling solution that is easy to install and remove.
However, when it came to using the auxiliary relocation cable to connect to a less conveniently located audio input, we found the MotorMouth to be a bit more cumbersome. We're not fans of semipermanently attaching baubles to our dashboard, and users who don't take the time to properly route or hide the cable could end up with a pretty ugly installation. For these users, we'd recommend simply sticking with a traditional visor-mount speakerphone. Take a look at your car and decide which camp you fall into before purchasing.