computer mouse pad DJ-530 1.with two usb1.1 port 2.good for promtion gifts 3.client's logo could print on surface computer mouse pad DJ-530SD MMC X D SM MS Pro option1.USB1.1 4 port,can be used as same time2.with speaker,listen music,and chat3.with mic,3.can connect speaker and mic4.wiht sound conditioner5.with light around, computer mouse pad DJ-530