Goplus MD-3010II Metal

Specifications
Material: ABS
Dimension: 8x18x40-45inches
Diameter of the detector plate:8"
Power: 6 x 1.5V AA alkaline batteries (not included)
Operating current:stand by: - 65mA, Max. - 150mA
Operating Voltage Range: 72 - 9.6V
Operating Frequency: 7.5KHZ +/- 1KHZ
Sensitivity: Min. 8 inches 
Temperature Range:-4-140°F/-20- 60°C
Weight: 2.4lbs/1.1kg
Audio Frequency: 294HZ (re), 330HZ (me), 349HZ (fa), 392HZ (so), 440HZ (la), 494HZ (ti), 523HZ (do)