TONOR TW820 Manual De Instrucciones página 7

Instruction:
1. Press button 2 for 2s to turn it on/off.
2. Press the HI-LO button 4, then the frequency on the screen wilI be
changed.
CH0 1
CHA
HI LO
06
CH0 1
CHA
4
CH0 2
CHA
1
2