The Tiger is designed primarily for indoor use on flat ground, although the 8 inch wheels do allow it to be used outdoors. As with most rollators, it features a seat for resting on and a detachable shopping bag.
The standout feature is the forearm supports - we have found many people prefer to rest their arms on something when walking, rather than having to grip handlebars. The forearm rests can be adjusted to different heights and lengths to fit those of all sizes.
A Tiger Plus variant is available, which for a small additional cost, benefits from being able to rotate the forearm rests (third picture) to aid posture alignment.
The Tiger and Tiger Plus are good choices for those who need more support for their arms when walking. The other model to consider is Rollz's Flex, which has an adjustable push bar that you can rest your arms on.