30x Binocular includes the following features : 

• 30 times magnification
• Objective diameter: 21mm
• Field of view: 131m/1000m
• Eye relief: 10mm
• Minimum focus distance: 3 m
• Focus system: center
• Eyecups: fold down
• Prism system: BK7, roof prism
• Lanyard included

Material :

• Rubber housing
• Aluminum alloy chassis
• Optical glass

Size closed :

• Length of 10.2 cm x Width of 9.1 cm x Height of 3 cm
• Weight of 175 grams