portable metal detector

Specification:
high detectivity and speed of detection that can be widely used in security inspection and theft protection places.
Functions:
(1) High sensitivity with audible and visual alarm.
(2)Only one button switch, easy to be operated.
(3) Thimbleful electric current consumption: alert 0 mA, working less than 1mA, alarm 6.5mA
(4) Rapid detection: reset and finding a new target after last alarm needs only 0.1 second.
(5) Low voltage indication: continuous checkout of the power and indicate by the red LED light when voltage is low.
Technical parameters:
(1)Working temperature: -20℃-65℃
(2) Working humidity: 98%
(3) Power switch: push-button switch
(4) Alarm indicator: speaker and red or green light LED
(5) Detection speed: 0.1 second per time
(6) Battery: 1 x 9v battery
(7)Size: 41cm (L) x14cm (Diameter of the detection circle) x2.8cm (H)
(8) Weight: about 280g