Two words: Don't buy. I ordered this from CDW and got it in 4 business days. Upon receiving it, I hooked the mouse up to my work laptop which is a thinkpad. There was a noticable delay between moving the mouse and seeing it move on the screen. No big deal I thought. Wrong. When I got home, I hooked up the wireless mouse and keyboard to my Powermac. The delay is awful. I told myself I could live with it but after using it for a little less than 3 hours, I decided to quit fooling myself and to admit to the truth; the S 530 just plain stinks. To be perfectly honest, the keyboard even feels cheap. The keys feel very hollow like you would find on a 5 dollar keyboard. Pathetic. The mouse is nice but again, the lag totally kills it. I am returning this setup as soon as I get back to work on Tuesday. I have to pay about 7 dollars to ship it back so that's what I lose for ordering a piece of crap. For anyone that is even remotely considering purchasing the S 530...you have been warned.