Specifications Fieldmicroscope Magnification (x) 20x (fixed) Optical system Upright, unreversed image; eyepiece diopter adjustable for right eye; 56-to-72mm interpupillary distance adjustment Field of vision (mm) 11 (diameter) Angle of view (º) 12.6 Vertical adjustment 50mm from the base of stage Eye relief (mm) 11.1 Plate Removal and reversible (top: flat; underside: built-in cup) Light source 2.5V-0.5A halogen lamp Light settings On/off Power source CR 123A lithium battery; approx. 1-hour bat
Easy blowing, High tone dog whistle, fitted with solid, waterproof pearl, to give a trill for those who want a distinctive and different sound. With a frequency that fluctuates by 750 Hertz. 210 Small ultra high pitch whistle has a natural cork ball which produces the familiar 'trilling' roll of the pea whistle. 210.5 Same as the 210 but with out the cork ball, produces a single extremely high frequency.
table.extra-information {background:#e0e0e0;margin:30px 0 60px 0;} table.extra-information th, table.extra-information td {font-weight:normal;text-align:left;padding-left:15px;background:#ffffff;font-family:Dotum;font-size:11px;height:28px;} table.extra-information th {width:15%;background:#f5f5f5;color:#515151;} table.extra-information td {width:35%;color:#666666;} 수입원 삼양테크 A/S 휴포레스트/삼양테크 KCC인증필 유무 해당없음 출시년월 2011.4.