The MX 700 is in essence, the wireless version of the corded MX 500. The design of the mouse is nearly identical with the exception residing in the absence of the cord and the difference in weight. The MX 700 requires 2 AA batteries to be inserted into the unit, adding quite a bit of weight. This actually works out to be an advantage, it adds more weight to the mouse and makes the entire unit feel much more sturdy than the corded mice, I was already beginning to fall in love with it.Unlike Logitech’s last cordless mouse, the MX 700 features rechargeable batteries so that the consumer can be spared the chore of having to purchase batteries. The charger itself is in the receiver of the unit, which plugs into the wall and into the USB port of the computer. To recharge the batteries you simply just place the mouse onto the cradle and the charger does the rest of the work. This integration of receiver and charger is definitely a huge plus in the convenience department.Battery life is much more longer than I had expected, I accidentally left my mouse off the charger at night and awoke to find the mouse still fully operable. In fact it lasted me for the better part of the morning but required a recharge by midday. If I had to estimate I’d say that the battery life is in the neighborhood of 5-10+ hours on a full recharge. Charging time is also kept to a minimal and is convenient since the unit can be recharged when it’s not being used.Much like the MX 500 the mouse features 5 additional buttons that populate the surface of the mouse. There are two buttons that essentially perform the functions of the scroll wheel, the forward and back buttons and an especially neat addition in the task switch button. The task switch button is by far the best thing to happen to mice since the wheel and the optical eye. Essentially, it allows you to perform the alt+tab function with the press of a button. Perfect for office work and people who are multitasking, you can change tasks with the click of one button. The design itself is a nice blend of black and gunmetal. The top portion and the left and right clicks appear to be one construct but actually operate separately. The sides of the mouse are rubberized to offer maximal grip while the thumb groove allows for a comfortable hold. There is also an additional groove on the right side of the mouse to accommodate the ring finger of your right hand. Sadly though, southpaws might find themselves having a hard time with this mouse. Everything seems to be designed with right-handers in mind including the grooves and the buttons.Though the design and construction of the mouse is excellent, nothing can compare to its performance. This is by far the most accurate mouse ever designed, using the new MX technology, you’ll get the smoothest mouse movement in the business. The optical eye just does an amazing job of picking up on even the slightest of movement, allowing me to have a much easier time picking off enemies in first person shooters. Just by tracking my cursor in Windows with my eyes, I can notice the amazing improvements. The cursor moves across the screen much smoother than my old Microsoft Intellimouse Pro Optical and seemed to be far more responsive. The improvement in the technology is immediately apparent; once you go MX you’ll never want to go back, period.The range on the mouse is also quite exceptional. I’ve been able to receive non-lag gameplay from distances of about 8-10 feet from the receiver. I did experience quite a few problems after that so I wouldn’t recommend you going any further than that. If you have a setup where you own a wireless keyboard and work with a projector or some sort of output then you should seriously consider using this mouse. It can provide adequate range without substituting performance.