?Functions?
 ? Sensitivity:super sensitive, a tiny metal piece like a paper clip can be detected;
 ? Anti-resistance:resistance can be removed by adjusting button;
 ? Self-diagnosis:auto diagnosis when starting, no need to adjust;
 ? Alarm:by sound, buzz and light;
 ? Recognition function:to distinguish the size and distance of the objects by colors green, yellow and red; to distinguish the size and distance of the objects by sound.
 ? Work mode:only bigger size metal item will alarm while using low-sensitivity mode (keeping pressing this button while detecting)
 ? Applications:High decibel designing to use in noisy environment

?Specification?
 Working voltage:One standard 9V alkaline battery
 Working frequency:95KHZ
 Working environment:-20? - +55?
 Adjusting:Automatic
 Dimension:420mmx41.3mmx83mm
 Weight:0.5Kg