The Adonis AM-708E is a high quality desktop electret condenser microphone with built-in compressor amplifier. Up to two transceivers can be operated from the AM-708E by simply operating a slide switch. It is also equipped with a FM/SSB audio quality selector switch for optimum operation. There are two fixed levels of compression High (45db) and Low (35dB) plus a Manual position, where a compressor level volume control is activated. There is an 'on air' indicator which lights up continuously when transmitting. The analogue meter acts as a battery checker and output level meter. Time out timer (2 to 3 minutes) with time reset function, when activated de-keys the transceiver and alarm sounds for up to 30 seconds (can be disabled).