Material Type:Handheld Metal Detector Hand Held Metal Detector -- a great security scanner for detecting metal objects in school, airport or anywhere you need a dependable metal detector.High Sensitivity Even Detects Small Hidden Metal Objects - LED Lights Alerts to the Detection of Metal - Choose Between Sound or Vibration Alerts - Easy and Convenient Use, No Adjustment Necessary - High/Low Sensitivity Settings Application: e.g. to find nails, screws and metal in lumber; find your lost rings and penny;Treasure hunting games for kidsWarning note:Please avoid charging it when you have no rechargeable battery, otherwise it can't work normally Specifications: Detection Distance: pin detection at 4 in; a 20 mm steel ball at 2.7 in. Depth. (the larger detected metal, the farther detectable distance) Indicator: LED indicators, Audio, Vibration Detection Sensitivity: 2.5mm Steel Ball Battery Required: 9V - Battery Depletion Warning Power Consumption: 270mW- 50mA Operation Temperature: -20 to 90 degrees F Perfect for Security, Safety, Indoor/Outdoor Events(Can't waterproof) Net Weight: 14 oz. Dimensions: 16.0'' x 3.3'' x 1.7'' inches Package list: 1 * Security Scanner Metal Detectors 1 * 9V battery 1 * Belt Holster 1 * English user manual Worry-Free Warranty We always adhere to the concept of development: Innovation, Diversification, Sustainable Development. If you have any issue, please do not hesitate to contact us, we will contact with you within 24 hrs.