This page shows the various 'other' instruments available from JMI: harmonicas, accordions, saxophones, keyboards, and the Vox radio microphone.
The Vox radio microphone was described as follows:
The solution for performers who wish to move around freely without direct contact with the amplifier or the encumbrance of connecting cables. A Lavalier type microphone is connected to a miniature transmitter concealed in a pocket. The compact receiver unit fits to any high impedance type amplifier. GPO approved. Crystal controlled. Transmitter and Receiver operating on 174.6 to 175 m/cs
$100
$1600
$4560
$548
$60
$350
$6000
$125
$40
$110
$2000
$5999
$55
$40
$850
$60
$40
$4572
$40
$34