Microsoft Comfort Curve Keyboard 2000 -lrb- b2l-00002 -rrb-  the key be large which help in typing . it have a bit of a curve make it easier on the hand without get that middle split like the newer one . my bluetooth 's keep mess up or just die or the transceiver go bad . I get tire of have to replace it . it might have have a good warranty but lose the keyboard and wait for a new one be a pain . this be a simple usb that you just plug in and it be good to go . I have large hand and get tire of those little keyboard with the little key . type well , key do not ever stick . I be happy with this purchase . I use it to replace all my Microsoft Bluetooth 's that I love but have too many problem , too much replacement .