Specifications Amplifier: Sensor Type: Piezoelectric element Amplification: 55 dB Frequency Range: 100 Hz to 2,000 Hz Notch Filters: 150 Hz and 180 Hz Temperature Range: 25°F to 130°F Power Supply: Two AA batteries (alkaline or rechargeable) Battery Life: 24 hours (alkaline) Weight: 10.6 oz (with batteries) Dimensions: 8.15" W × 3.3" H × 2.4" D Headphones: Type: Stereo over-ear Impedance: 8 ohms Carrying Case: Material: ABS plastic Weight (Full): 10 lbs (4.55 kg) Dimensions: 18" W × 12" H × 7" D Product Description The LD-8 Leak Survey Tool is an easy-to-use acoustic listening device designed for detecting water leaks at hydrants, meters, and valves. Ideal for municipal water departments and utility companies, the LD-8 uses a rod-based sensor and powerful amplification system to locate leaks through sound. It features a simple amplifier with push-button controls, a two-digit loudness display, and a three-range sensitivity switch. The included short and long contact rods allow users to monitor both above- and below-grade assets. Built-in notch filters reduce interference from nearby transformers and power lines, while the stereo headphones provide clear audio with all-day comfort. A compact, 10 lb. carrying case makes the LD-8 easy to transport and store between job sites. In the Box 4-Section contact rod set (52”) Over the ear stereo headphones Amplifier w/display & volume control ABS plastic custom carrying case Short contact rod (4”) Instruction Manual Brochures and Manuals SubSurface LD-8 Water Leak Detector Product Datasheet