1.   The optional BillLimit feature enables customers to budget by setting a monthly limit.

2.   Many optional features are available on this car.

3.   Analysts like an optional feature on the site that sends hosiery automatically four times a year to online shopper.

4.   But LNP will roll out as an optional feature.

5.   Camel rides are an optional feature of many escorted tours to Morocco, such as those offered by Overseas Adventure Travel.

6.   Other optional features include chat lines, group white boards and note-taking devices.

7.   Some optional features to consider include shutter buttons, microphones and the length of the cord.

8.   Some high-end TVs already include such devices as optional features, he said.

9.   The new model is reported to be smaller than the existing Newtons and will have an optional backlighting feature.

10.   The optional feature acts like a door, opening wide to prove easier access to the rear cab area.