7 in 1 multifunctional wireless presenter multfunctional 2.4G wireless mouse presenter ,Track ball presenter,Red laser pointer The trackball ... website ,page up and down ,switch screen .laser pointer ,mouse R key & L key and trackball(M2)close current window ,open ... and my favorite ,zoom in and out ,laser pointer .mouse R key & L key and trackballoptional memory :1GB,2GB,4GBand moreOperating ...