 None 
 V 
 mV 
 A 
 mA 
 dB 
 dBm 
 mF 
 F 
 nF 
 GOhm 
 MOhm 
 KOhm 
 Ohm 
 % 
 MHz 
 KHz 
  Hz 
 C 
 F 
 sec 
 ms 
 s 
 ns 
 Others