Jelly Comb via Amazon offers the Jelly Comb 2.4GHz Ultra Slim Rechargeable Wireless Keyboard / Mouse Combo for $59.99. Coupon code "F6NG2TOC" cuts it to $29.99. With free shipping, that's $40 off and the lowest price we could find. It features three adjustable DPI levels and it requires two AAA batteries (not included).