How to use? 1.put into battery,turn on power,machine' led light will light. 2.when close to metal.machine will alarm.But it is not continuous alarm. 3.when machine is in static mode.move metal will make machine alarm one time. Key Features: Automatically adjusts...Microprocessor circuitry insures maximum sensitivity with no tuning necessary. The PRO-POINTER does not interfere with your metal detector Pinpointing Tip and 360 degree side scanning capability in one pinpointer. LED flashlight assists in low light condition recoveries. Woven belt holster...is included to secure PRO-POINTER to standard size belts. Utility uses...Search walls and tight spaces for caches...find metal pipes in walls or nails in drywall to locate studs...check wood for nails before cutting with expensive tools. Water resistant... pinPOINTER can be washed in running water or used in the rain. Tuning:Automatic Specifications: OperatingTemperatures:-35F(-37C)to158F(70C) OperatingFrequency:12kHz Indicators:Proportionalaudio/ibrationpulserate Controls:Power switch Dimensions:Length 23cm Thickness: 4cm Battery:Single9V( not included) included : Hand Held Metal DetectorBattery ( not included) *1 user manual *1 hook *1