Hand Held Metal Detector with LED Light + High Sensitivity

Technical Specifications
Operating frequency: 20 kHz
Weight: 272g (including the battery)
Size: 420(L)*138(W)*110(H) mm
Regulate the way: manual
Indicator: BZ, vibration motor
LED light proves:
LED red: warning indicator lamp
LED green: insufficient voltage indicator
Battery: 9V battery (suitable for working for 40 hours normally)
Control: circulation switch (on, off, a sound of light or mode of vibration)
Uses cycle-switch to switch sound alarm and hidden vibration alarm respectively
Highly sensitive, detects ferrous metal and non-ferrous metal
Sound and light alarm simultaneously
Alkaline cell (7 to 9V) can work over 40 hours and distance does not change