The Alphatek TEK693D electrical Tester provides voltage and continuity testing in a compact case with rugged rubber housing. The Alphatek TEK 693D which will turn on automatically when you place the probes together and
 
►  Automatically selects VAC, VDC or Continuity Test  
► 1999 Counts LCD actually displays voltage 
►  Automatic On and Off
►  High Input Impedance 400 k ohm 
►  Low Battery Warning
►  AC / DC Voltage 0-600V
►  Automatic Negative Polarity Indication
►  Continuity Test Audible beeper and Visual
►  Battery 2 x AA (alkaline) 300 hours life