I've heard so much about the Vmax I just had to try it, so we just got in our first shipment of the newest SS Vmax with the Ego connection and I wound up taking one for myself, lol.

In the video I just had my old 1.5 ohm dual coil carto on it to test, but have been using a 3.0ohm ever since and the battery life is amazing.

To recap the features in the video -

1 - Voltage up in 0.1v increments
2 - Voltage down in 0.1v increments
3 - Standby mode on/off
4 - Current Battery Voltage
5 - Changes what is displayed on the LED when the button is pressed: o - output voltage, u - battery voltage, R - ohms
6 - Turns the LED display on/off