As explained by the average house cat,
or should I say average Lolcat:
You have to keep up with advances in science after all.
PD552 has two jacks, one for headset, the other for microphone.
a. USB audio adapter
b. USB 1.1 and 2.0 compliant
c. USB bus-powered capability
d. 3D sound technology virtual 5.1-channel sound field
e. Hot plug-and-play USB interface, eliminates the need of a traditional sound card
f. Supports USB suspend/resume modes and remote wakeup
g. Apply advanced Xear 3D technology to the product, fully support many kinds of sound frequency such as MPG/DAT/AVI/MPG4/RM/MOV ect, and functions such as EAX1.0/2.0, HRTF, 3DX ect.
h. PD552---Virtual speaker shifter, freely set and switch the microphone mode or speaker mode
i. PD552---Record function by microphone; 16 rhythm modes for selection
Any number that reduces to one when you take the sum of the square of its digits and continue iterating until it yields 1 is a happy number, any number that doesn't, isn't. A happy prime is both happy and prime. NOW TYPE IT IN! [turns to captain] I don't know, talk about dumbing down. Don't they teach recreational mathematics anymore?