Dear Sir Madam, Type:Mountain Bike Wheel Size:26" Frame Material:Aluminum Alloy Fork Material:Aluminum Alloy Suspension Rim Material:Aluminum Alloy Wattagw Color:black gray Battery:48 V 11.6ah lithium battery Brake Type:F&R disc brake Full Speed:50 km per hour Motor:brushless rear motor Range:about 60-70Km PAS Derailleur:outer 6-Speed Display:LCD