Technical parameters:
Sensitivity: Low Sensitivity, Normal Sensitivity, High Sensitivity and Ultra High Sensitivity (Detectable Single 12# Book Pin)
Alarm Mode: Vibration, Sound, Vibration and Sound 3 alarm modes, Operator can judge the metal quantity of detected object by acousto-optic prompt, external earphone.
(1)Weight :≤270 g( without batteries);
(2) Protection level: not less than IP53;
(3) Batteries: batteries of common type shall be supplied and the supply voltage shall not exceed 15 V,2 batteries of 5 shall be used for replacement;
(4) Working hours: at least 80 h of continuous normal operation without replacement of batteries or re-charging, standby time should not be less than 180 hours; charging power-saving function: the equipment should have charging function, charging should have indicator light prompt. the device should have power saving function, when the device is not in use for more than 2 minutes in the state of boot, the device will enter dormant state, when there is metal near in the state of sleep for 10 minutes, the device will automatically wake up, and when there is no metal near in the state of sleep for more than 10 minutes, the device will automatically shut down;

(5) Operation and control device: one-button switch machine; low, medium, high, ultra-high level 4 sensitivity adjustable, each sensitivity can be quickly switched, can connect headphones to meet different environmental needs;
(6) Radiation magnetic induction intensity: The magnetic field emitted by the detector shall not exceed 8μT; at any point on its surface
(7) Sensitivity range: should be able to fit or cover a test level;
(8) Detection capability: detection capability :≥65 mm;
(9) Continuous working stability :≥80 h;
(10) Alarm sound: The alarm sound ≥80 dB (A), the alarm sound should prompt the other information sound to have the difference;
(11) Recovery of the alarm state: The detector has the ability to recover the alarm state automatically, and the alarm indication should stop immediately after leaving the prescribed distance of the alarm test object;
(12) Working temperature: shall continue to work for two hours -20±2℃ and  working for 2 hours 55±2℃;
(13) Interference resistance: multiple detectors are used at the same time m 0.6 apart, each of which can work normally;
(14) Resistance to the influence of surrounding metal objects: moving metal objects outside the range of 0.6 m should not cause the detector to alarm by mistake, and the detector near the large metal object should automatically recover its detection performance one min after leaving the large metal object;
(15) Detection modes for ferrous and non-ferrous metals: detectors shall have three detection modes;
(16) Mixed mode (both metals can alarm);
(17) Detection mode for ferrous metals (no alarm for non-ferrous metals). Material: Shock resistant, impact resistant ABS plastic
Material: Shock resistant, impact resistant ABS plastic