KEN -A-VISION PrepScope Elementary Microscope. HEAD: Mono. EYEPIECE: W10X. OBJECTIVES: 4X, 10X, 40XR. Illumination: 10 Watt, Built-in. A microscope designed for the younger student. Student-proofed, ruggedly built and easy to use. FEATURES: Ten-year limited warranty - 360° rotatable head. Optical System: Widefield 10X eyepiece, locked-on, mounted on 45° inclined head. Black DIN objectives 4X, 10X, 40XR. Focusing System: "No-Slip" Guarantee - guaranteed not to slip under normal use - Low position co-axial focusing - one knob controls both coarse and fine focusing - Slip clutch prevents mechanism damage. Illumination: LED Cordless, rechargable. NiMH Batteries (charger included). 40 hours of use per charge. Frame: High density plastic covered metal base. Height - 12", base 6" x 4", weight - 4 lbs. Connecticut Valley Biological is a fully authorized Ken-A-Vision dealer. In addition to the scopes listed here, we carry the complete line of these fine products and invite you to contact us with your microscope inquiries.