Features: Sharp stereo erect image over a wide fieldview. 45angel inclined and 360angel rotatable binocular head with locked-in eyepiece. The left ocular-tube with diopter adjustment +-5dp. The interpupillary distance is between 55~75mm. Three kind of 90angel rotatable objective for selection: 1x/2x, 1x/3x, 2x/4x Power supply 110V/60Hz or 220V/50Hz Illumination: L1. upper reflected halogen light 12V10W; down halogen light 12V10W L2. upper reflected halogen light 12V10W; down halogen light 12V10W; brightness is adjustable. L3. fluorescent lamp 5W for transmitted light and halogen lamp 12V/10W for incident light. L4. fluorescent lamp 5W for transmitted light and halogen lamp 12V/10W for incident light. Brightness is adjustable. L5. it always adopts LED lights for the transmission and reflex illumination. Each set packed in Styrofoam and in an inner box. Four sets in one carton. The outer measurement is GRGH01P1/20; 85?5?0cm GRGH02L-W; 50?7?8cm. /shhh_3_product6.htm