How i can see who is connected on my TP Link Wifi ADSL2 modem + router?

I am using TP Link 150Mbps Wireless N ADSL2+ Modem Router ( TD-W8151N ). I have 2 computers attached with it via wire. I can see which computer is using internet on router but i dont know how to see who is connected with my router via wifi. Can any one tell me how i can see who is connect on my router with wifi?