1. Zener diode as voltage regulator kit

Voltmeters: Digital DC
voltmeter (2 nos)
Display: 3½ digit, LED
Range: 20 V
Resolution: 0.01 V
Power Supply: Regulated variable voltage 0-20V DC with coarse and fine controls
Components: Built in fixed load resistance

2. Zener diodes

Set of 4 different breakdown  voltages
Rated Input: 220 V/50 Hz  or 110 V/60 Hz
Power Consumption: <30 W
Cabinet: Acrylic body,  aluminium bottom

3. Set of diodes

Breakdown voltage 3.6V, 5.1V,  9.1V and 12V

4. Patch cords

Set of standard 2 mm patch cords of different lengths with spare cords