Only works properly if the USB interface / radio is "to the mouse." Otherwise hysterics needed! For a round plug on the front, or use a mini extension 30/50 cm to return to the front. For a laptop, put it on the side or will find the mouse. = To the right for right-handed and vice versa. For clicks Drt / Left, contactors are of poor quality so double click will be difficult. Zen, Zen stay! that is why I removed 2 stars. Conclusion, good value mediocrity / price. perfect for casual use but for online gaming, prohibited. Sincerely, SD