The kit consist of the following:
1 x Trough
1 x Needle
1 x Rod with socket
1 x Multi-meter
1 x Cylindrical base
2 x Bar electrode
2 x Disc electrode
1 x Ring electrode
1 x Stand rod
1 x Boss head
1 x Power supply (2-12 V AC). Output voltage 2,3,4,5,6,8,10 and 12 V AC full wave, rectified, un-smoothed and unregulated D.D in maximum 8 steps. Overload protection re settable thermal trip. Working voltage 230 V AC, 50 Hz
2 x Flexible plug lead (set).

Watch a YouTube video from the manufacturer. https://www.youtube.com/watch?v=KyO1_DZnLgs