You can use this portable metal detector to detect the existence of small metal objects. This metal detector is a great aid in the process of body searching for offensive objects in crowd control, airport and border security, package checking for metal objects and anywhere hidden metal needs to be detected. also used to search for coins, relics, jewelry, gold and silver anywhere, which can remind you of the presence of the metal object and notify you of the location of it with sound and vibration alarm. Features: Detect metal objects in airports, train stations, docks, customs and border defense for security inspection. br/> Provides precise metal safety inspection with adjustable sensitivity. Three colors of indicators, green light for power, yellow light for low battery, red light for metal detection alarm . Easy to use with 2 alternative alert modes of audio signal indicator and vibrate indication. Portable and lightweight and easy to carry with a wrist strap. Battery socket rechargeable batteries to charge the product after installing the rechargeable batteries. Widely used for security screening and detection of prohibited goods, electronic products, metal objects in the station, border defense, school, court and factory. Features: Color: dark gray Material: ABS plastic Indication of alarm: Bright yellow LEDs: a metal target has been detected Flashing green LED: power on Flashing red LED indicator: low voltage indicator Alarm signal: br/> Sound mode: Buzzer and red LED Vibration-Mode: Vibrations and red LEDs Detect objects: metal (handgun, dagger, steel ball, coins) Frequency: 22 KHz Power consumption: 270 MW Max. Standby current: 8MA Reset time: 0.5 seconds, automatically Distance detection: Pin, iron nail: 30-60mm / 1.18-2.36 inch Parts: 75-100mm / 2.95-3.94inch Handgun: 160-180mm / 6.30-7.09inch Six inch dagger: 160-170mm / 6.30-6.69 inch 20mm steel ball: 20-30 mm / 0.79-1.18 inch Operating voltage: 9V Batteries: 1 * 6F22 9V Batteries (not included) Operating temperature: -10 to +65 Package size: 380 * 80 * 38mm / 14.96 * 3.15 * 1.50in Package Weight: 250g / 8.82 oz Packing List: 1 * Metal Detector 1 * English User Manual