I gently used this detector to hunt meteorites for 2 years and everything works well. I have the 1 meter coil and a 28 ft coil and the handheld coil. Comes with a battery for portable use. If you have any questions please ask, I will do my very best to answer them

Deepmax is used to detect single coins, buried caches, and hidden treasures, (gold & Silver) Lorenz deep searching metal detectors are very easy to use. Just set the audio to your preferred threshold level and start scanning. No adjustments are required. Lorenz ignores practically all types of minerals. Lorenz Pulse induction metal detector models are capable of detecting targets to extreme depths. Lorenz (deep) metal detectors are pulse intermittent transmission types. A large electrical current is pulsed through the coil winding. A very intense, powerful, electromagnetic field is generated, which flows out into the surrounding ground at a given cycle period. The electromagnetic field contains a large amount of energy: some is "captured" by metal targets. The captured energy is in the form of eddy currents, which flow on the surface of the metal. The better the conductivity of the metal (gold bars, coins, plates and other nonferrous treasures), the longer eddy currents will flow. These currents create a secondary electromagnetic field that flows outward from the target and passes through the pulse antenna, where some of its energy generates a signal. This signal is amplified and conditioned to drive the audio, which alerts the operator to the presence of metal.

The Pulse-GBS (Pulse- Ground Balancing System) is specially suitable for searching at great depths. The performance of this electronic device is unaffected by salt water and almost any type of mineralized grounds or temperature changes. Specially designed electronics cancel out signals from the ground. The Lorenz Deepmax is therefore a reliable tool to locate metal objects at great depths even under the worst environmental conditions. A new circuit design suppresses interference from power lines and a Power Pulse technique produces very accurate signals to obtain detection at deep depths.

MORE FEATURES: of the Deepmax * High sensitive to all kinds of metal * Stable operation on mineralized ground or salt water with Pulse -Ground Balancing System * Reliable/ Simple operation * exact pinpointing with large coils * very easy and effective detection of large areas * rugged mechanical construction * a variety of search coil are available for different detection purposes * automatic adaptation of different coil sizes to the electronics * small unwanted metal objects can either be identified or eliminated * fast audio response speed with voltage controlled oscillator (VCO) * logarithmic audio response for easy pinpointing * battery check with meter and audio alarm tone * calibrated static (Non-motion) target classification with conductivity meter reading * ferrous/non-ferrous identification * precisely adjustable audio-threshold * stable static response (acoustical and visual) * waterproof search coils * interchangeable rechargeable battery pack * charge electronics with interchangeable AC-plug for world wide operation * frequency control for interference elimination * automatic push-button retuning facility * different delay settings to eliminate small objects or for easy pinpointing * optimal performance for the detection of small objects like coins or other non-ferrous objects as well as for bigger objects buried deep. * single or dual induction balanced or differential coil designs can be used