White’s TM 808 Manual Description of buttons THRESHOLD- tone background The button opens THRESHOLD ( ON) and off (OFF) the TM 808 and adjusts the volume of the background or as it is commonly called «threshold». If you turn the THRESHOLD knob to clockwise , the sensor opens (ON) and the batteries automatically check.
THRESHOLD- tone background
The button opens THRESHOLD ( ON) and off (OFF) the TM 808 and adjusts the volume of the background or as it is commonly called «threshold».
Read more
 and off (OFF) the TM 808 and adjus…){kind=link}