Feature Detect ferrous and non-ferrous metal Light weight and portable design Good sensitivity Easy to handle and use Rugged construction, ABS moulded case Benefis The MD-3003B1 is a high performance hand held metal detector designed to meet the exact requirements of the security industry. Typical uses will include body search for offensive weapons in crowd control,airport and border security,checking parcels and letters for metal objects and anywhere that hidden metal needs to be detected. Indicators Green LED light indicates¡ªON Yellow LED indicates-- low battery Red LED indicates¡ªalarm Specifications Dimension: 415mm(L)X85mm(W)X45mm(H) Operating Frequesncy 22KHZ Operation Current £¼50 mA. Operating Temperature -5¡æ to + 55¡æ Power: 9v battery Weight: 409g It has alarm and audio/light-auto switch functions Detection distance Pin: 30-60mm 64 model handgun: 150mm 6 inch long knife: 160mm Diameter 20mm Steel Ball: 90mm Battery Single 9 volt alkaline or ni-cd Battery life:30 to 40 hours (ni-cd) 28 hours (alkaline) Safety The MD-3003B1 is safe for the people with pacemaker and pregnant women,magnetic floppy, and recording tapes. The magnetic field strength of the MD-3003B1 can meet for the EMC Radiation Stardand Warranty 12 months for the parts and labor