Anico ARSM979-PC1 speaker microphone for eChat E350, E360 transceivers. With C-type connector.
An amplifier is built into the microphone body, powered by a built-in battery. Since the compatible devices are not ordinary transceivers but handheld Android smart terminals, this is the way to guarantee clear and high volume sound. The internal battery can be recharged using the charger that comes as a standard in the package.