The power specification in the HP envy 7640 printer are classified in to four divisions. They are the power consumption, power supply type, power supply and the energy saving feature technology.

HP Envy 7640 Printers Power Specification
- Power consumption
The power consumed by the HP envy 7640 printer is 13.95 watts when printing, 3.60 watts when it is ready, 0.93 watts when the printer is in sleep mode and the 0.20 watts when the power is off.
- Power supply type
The power supply type of the HP envy 7640 printer is a built-in universal power supply which makes the power supply easier.
- Power supply
The power supply need by the HP envy 7640 printer is 100-240 V (+/-10%), 50/60 Hz(+/- 3Hz)
- Energy saving feature technology
The energy saving feature used in the HP envy 7640 printer is the HP Auto-Off technology. The Auto-Off technology will give more control over the consumption of energy and checks whether the printing devices get switched on automatically when you require them and off when you don’t need them. This feature conserve energy and cut costs. It also easily customize for your needs.