ENTER is a new brand to the World of Computer accessories. But I think they failed. I bought one unit of ENTER E-W55 Wireless Optical Mouse last month. Actually I got it free when I purchased one Laptop. But after using of hardly one week, it stopped working. I think there was a problem in internal connection. If a replaced the battery and hit it for two three times, it starts working, but lasts for only 10-20 minutes. After that they replaced it and gave me another one. Again after using 1 week, the some problem arises.
And specially for the gamer, please don’t use ENTER mouse. Its a cheap one, but pay little more and buy some good one. Enter mouse is not good more rough use like playing games etc.