Conquer Iron-Infested Sites With Adjustable Iron Audio FeTone®Adjustable Iron Audio Enhanced V-Break® Tone Discrimination System Notch Mode with Adjustable Notch Width Adjustable Backlight Computerized GROUNDGRAB® One Touch Ground Balance with Manual Override Unmatched Target Separation in Iron and Trash Continuous Ground Condition Readout Ground Phase Value Indicates Type of Mineralization Fe3O4 Graphic Indicates Amount of Mineralization Ground Balance All the Way to Salt Static All Metal Pinpoint with Depth Indicator 19 kHz Operating Frequency Ultra-Lightweight, Only 2.5 lb. (1.1 kg) Standard Coil 11-inch Open Frame Bi-Axial™ Waterproof Coil Yes Batteries 9-Volt Alkaline (not included) Battery Indicator Yes Battery Life 20-25 hrs. Pinpoint Mode Yes Target ID 1-99 Target-ID Numbers Audio Enhanced V-Break® Tone Discrimination System Volume Control Yes Discrimination Modes Linear Adjustment & Notch Discrimination Adjustment 1 - 79 Sensitivity Adjustable 1 - 99 Operating Frequency 19 kHz Depth Indicator Digital, 1" increments Weight 2.5 lbs. (1.1 kg) Length 43” - 53” Headphone Jack Yes, ?” (6.3 mm) Ground Balance Computerized GROUNDGRAB® Backlight Yes, Adjustable Standard Coil - 11-inch Open Frame Bi-Axial™ Waterproof Coil - Yes Batteries - 9-Volt Alkaline (not included) Battery Indicator - Yes Battery Life - 20-25 hrs. Pinpoint Mode - Yes Target ID - 1-99 Target-ID Numbers Audio - Enhanced V-Break® Tone Discrimination System Volume Control - Yes Discrimination Modes - Linear Adjustment & Notch Discrimination Adjustment - 1 - 79 Sensitivity - Adjustable 1 - 99 Operating Frequency - 19 kHz Depth Indicator - Digital, 1" increments Weight - 2.5 lbs. (1.1 kg) Length - 43” - 53” Headphone Jack - Yes, ?” (6.3 mm) Ground Balance -Computerized GROUNDGRAB® Backlight - Yes, Adjustable