Logitech MX620

Logitech’s MX620 is a cordless laser mouse, which means you can use it without cable even for gaming, as it has a higher precision compared to optical mice.
Based on the laser technology, it replaces the red LED light used by optical models, with an infrared laser diode which is invisible. This light reflects from the surface beneath to the mouse’s sensor, and the mouse scans all the incoming light sequences, which are then translated into cursor movements on the monitor. The scanned image resolution is higher than in optical mice, and laser mice have a tracking power 20 times higher.

With the cordless functionality things get a little bit more complicated. Like many of you I asked myself what’s the difference between a wireless mouse and a cordless mouse, so i hurried to find some clues to get the big picture and make you understand too.



It seems that computer mice that don’t have cables connected to the PC unit or laptop, use either the infrared transmission or the Bluetooth technology to work from distance. Both methods are categorized as short-range wireless communications. What differentiates them are the following characteristics: the infrared technology works at a shorter range between the communicating devices, and the signal breaks as one of them is moved from the direct line, or if an object interferes in this range, just like with any TV remote; on the other hand, Bluetooth is based on a radio frequency capable to pass through walls and doesn’t have directional requirements, allowing for handsfree operation like with cell phones, and works at 2.4 GHz frequency.



Some people tend to include the cordless mice in the infrared devices category which is not entirely correct. Cordless mice can be considered wireless devices, as they are cable-free, using a special wireless adapter, while it depends on the specifications to categorize them. There are some cheap entry-level mice that use infrared.

If we take a look at MX 620 from Logitech, in the specification list we find out about the 2.4 GHz micro-receiver that is the adapter you need to connect to your computer ‘s USB port to detect the mouse, which means it is not based on the infrared technology and you won’t have problems using it.
In addition to this technology, it features a fast scroll wheel that allows the user to scroll long documents and find things in the fastest time, with high laser precision.
You can use it in all types of operations including gaming, for up to 1 year, until the LED indicator tells you to replace the batteries.



Available at around $60, the cordless laser mouse model is compatible with Windows XP, Windows Vista and Mac operating systems, and is powered by 2 AA batteries, coming with the installation software and a 5-year warranty.

Even if they are designed to maintain a high tracking resolution on more types of surfaces than optical mice, laser mice still are a bit sensitive to mirrors and clear glass, but you have other option as well – the wireless optical mice – and it might help to choose what meets your requirements best, if you read some optical mice reviews.