* Plug Type.
* Three pairs of ratio arms are each 10, 100, 1000 ohms.
* Resistance arms contains 16 coils from 1 to 5000 ohms with infinity plug.
* Two spring keys having contact for battery and galvanometer fitted.
Student Microscope : Export Quality Products Specifications: Metal Construction Movable Condenser Eyepiece: 10x, 15x Objective: 10x, 45x Total Magnification: 100x to 675x Separate Coarse Fine Focusing Knobs Plano concave mirror on gimble mount for illumination Gives Clear Images Easy To Operate Ideal for School & Kids Color whichever Available: BLACK or SILVER 10 plain & 2 prepared slides includes