According to one aspect, a portable electronic device having a base portion having a keypad, and a sliding portion. The sliding portion is coupled to the base portion and slideable relative thereto between a closed position wherein the keypad is covered by the sliding portion, and an open position wherein the keypad is exposed. The keypad includes a plurality of keys, at least some of the plurality of keys having a ridge that extends upwardly from the top surface of the key. Each ridge extends between a lower edge of the key and an upper edge of the key and is curved therebetween. Each ridge is offset from a midline of each key.