[Handheld Handheld Metal Detector] This is a high performance handheld metal detector designed to meet the exact requirements of security. With a large detecting probe area, fast detecting speed and a high sensitivity. [Two alternative alert methods] With a power switch to choose between sound and vibration, easy and convenient to use. [Low Sensitivity Switch] Easily switch the sensitivity, realizing the detection of large goods and very small metal objects. [3 colors of indicators] Indicators of different colors, green for power, red for alert, yellow for low battery indicator (side). In addition, the detection area has several signal strength indicators. [Widely Application] Designed for security check and detection of prohibited goods, electronic products, metal objects in the station, border defense, school, yard and factory, security of airports and borders. Basic Features Power source: standard 9V battery (included) Detecting temperature range: -10~65 Alarm modes Audio alarm: Buzzer and red LED, metallic indicator Vibration alarm: Vibration and red LED, metal indicator Alarm indication Blinking green LED: power on; Blinking red LED: the target has been detected; Solid yellow LED: low voltage directive; Metal Indication LEDs (10PCS): The indicator lights gradually change from green to red while detecting metal objects of different sizes. Low sensitivity switch Easily change the sensitivity, realizing the detection of large goods and very small metal objects. Distance detection Staple: 1.18-1.97 inches Handgun: 7.87in Dagger: 9.84 inches 0.97 diameter steel ball: 4.72 Widely application Designed for security check and detection of prohibited goods, electronic products, metal objects in the station, border defense, school, court and factory, airport and border security .