I purchased three of these to use in 4 person games. Unfortunately, I can connect only one of these at a time. I can have this and the OEM controller working at the same time, and can use each of the three separately, but when one is connected the other two will simply "search" for a connection without ever making one.
My bad on this one for thinking it was an authentic Microsoft Xbox 360 controller, it is not if you are wondering. While not bad for a knock-off, it has a bit of a cheap feel to it, the player controller light around the home button is not sealed well, the whole ring is illuminated with the one are a little stronger so tough to tell what player you are. Other than that, it just feels okay...
New and improved ergonomic design enables maximum comfort and endless gameplay. New left and right shoulder buttons are designed for ease of use. Two analog pressure-point triggers, two vibration feedback motors, and one eight-way directional pad are included. Use the for Xbox 360 Guide button to keep track of your friends, access your games and media, or power on and off your for Xbox 360 console. Will work with future for Xbox 360 Wireless Accessories. Use up to four Wireless Controllers simultaneously with one Wireless Gaming Receiver. Easily integrates with PC gaming scenarios and utilizes the same binding technology as for Xbox 360. 2.4GHz wireless technology with up to 9-meter( 30-feet) range. Built for lag-free play. Integrated headset port for Xbox Live play.