The popular My First Lab Microscope has now been upgraded to the "Ultimate" educational tool! The same great optics are now even more versatile on a new base with a rechargeable battery light source. The detachable AC power cord can be used to power the light or recharge the battery for portable use "in the field". Battery lasts for hours and can be recharged hundreds of times for years of valuable scientific research! Features: Real optical glass lenses; 10X Widefield eyepiece with pointer; 3 Achromatic objective lenses: 4X, 10X and40X Power; Magnification from 40X to 400X; 90mm x 90mm Stage with clips; 6 Hole disc diaphragm; Coarse focus, easy grip knob; 20W equivalent lamp; Built in rechargeable battery and detachable AC power cord; Sturdy all-metal construction; Overall size: 4"x 6" x 11" H.N.W.:31/2 lbs.; Full color box size: 8" x 6" x 13". CE certified.