Description
BLX14E/SM31 headworn wireless system consisting of a SM31FH fitness headset condenser microphone, a BLX1 bodypack transmitter and a BLX4 Single Channel Receiver. 
 Band: M17 
 Frequency range: 662MHz - 686MHz 
 Output power: 10mW 
 Operating range: 91m (line of sight) 
 Transmitter batteries / Endurance: 2 x AA / 14h