Powerful, Rear-fire Speaker One-button Operation Adjustable Volume Control LED for Visual Signal Strength Indication Recessed Tabs for Telephone Test or Headset ConnectionNoise FiltrationImproved Tip Design for Better Reception and Lower Risk of Shorting Terminals Continuous-on FeatureFive-minute Auto ShutoffLow-battery IndicatorBattery Operated (9V not included).

Description:
• By selectively filtering out all 60Hz and 60Hz harmonics, the 200FP can be used with any tone generator for faster, more accurate, cable and wire identification.
• With three types of noise filtration, the Filter Probe virtually eliminates power-related noise from the tone-and-probe operation.
• Slim, comfortable design for use in limited-space areas.
• Recessed on/off push-button control to conserve battery life.
• Adjustable sensitivity/volume control to increase accuracy.
• Blended carbon/plastic tip to reduce the risk of shorting terminals.