One of them was Self Balance Electric Unicycle.
The key advantages of such intelligent transporters over current modes of patrols are:
1) Longer travel distance and reduction of fatigue allowing a larger coverage of patrol grounds as compared to foot patrols;
2) Increased portability compared to bicycles (can easily fit into the car boot);
3) Easy transition to foot patrols by dragging the unicycles when moving from outdoors to indoors(i.e. shopping centres);
4) Smaller footprint compared to bicycles thus allowing better manoeuvrability in narrow lanes; and
5) Allow quick mounting and dismounting when officers need to interact with members of the public.