The HP envy 7640 offers certain features which catch the eye of customers who demand quality printers. The printing technology works on Ink jet and is worthy of printing marvelous photos. Suitable for your home and workplace, the 123.hp.com/envy7640 can print a maximum of thousand pages which can be otherwise called as the duty cycle. Comes with a touch screen panel and the fax is done on plain paper. The best and distinct feature being its dynamic design, it is a multi-functional printer which can perform the functions like copying, scanning and printing. It boasts a RAM with a memory size of 128 Megabytes.