1) Magnification: 2x 2)Eyepiece diopter range: ±5 diopter 3) Field of view: 19o 4) Objective focusing range: 5m to infinity 5) Operating voltage: 3V DC(use battery No.5) 6) Weight: 0.6kg 7) Resolution: ≤1.6mrad 8) Effective visual distance: 150m Outer packing: 12pcs/ctn Carton dimensions: 355 x 200 x 225mm