More details of some examples of waterproof microphones and speakers are discussed in U. S. patent application Ser. No. 15/209,735, filed Jul. 13, 2016, titled “Magnetic Mount Assembly of a Camera,” which is hereby incorporated by its entirety. Referring to FIG. 7B, in some implementations, a rear exterior surface of the device housing 702 provides an access to at least one of a plurality of wire terminals 720 and an electrical connector 722 e. g. , a Universal Serial Bus USB connector. The plurality of wire terminals 720 include a first terminal and a second terminal configured to receive a power supply line and a ground line for driving the plurality of electronic components contained within the device housing 106.