Specifications Overall Length: 38.75 in (98.4 cm) Controls: On/Off & Volume, Gain Up, Gain Down Construction: Aluminum monotube body; ABS injection-molded electronics case Audio: Front-panel real speaker with tactile keypad clicks Memory: Saves last-used volume and gain settings Applications: Detects ferrous metals such as survey markers, well casings, septic tank handles, and steel drums Power Source: (2)x 9V Alkaline Batteries Battery Life: Minimum 40 hours Weight: 2.0 lbs (0.9 kg) including batteries Warranty: 7 years Product Description The SubSurface Instruments ML-1 Magnetic Locator detects ferrous objects up to 10 feet deep. With its one-handed operation and three-keypad controls, it is easy to use in the field with no learning curve. The volume control is built into the on/off key for quick adjustments, while the microprocessor saves your last gain and volume settings for efficiency. The ML-1 features a robust monotube aluminum body with an ABS injection-molded electronics compartment. It weighs only 2 lbs including batteries and offers at least 40 hours of runtime on two standard 9V alkaline batteries. Backed by a 7-year warranty, it features a real front-panel speaker, tactile keypad clicks, and memory for last-used settings. In the Box ML-1 Soft-Pack Custom Case 1 set of 9v Batteries Instruction Manual