The Falador shield 4 is a reward for completing all of the Falador Tasks, including the elite tasks. It is obtained from the Squire in the White Knights' Castle in Falador, and can be reobtained from him for free. It is one of the items that is always kept on (normal) death, although it can be lost in the Wilderness if it is not the most valuable item the player has (with Protect Item active).
Restore up to 100% of your max prayer points twice per day (resets at 00:00 UTC)
Operate shield (via Worn Equipment tab) to help locate the giant mole in its lair beneath Falador Park
At all times
A +20 Prayer point bonus when using the altar in Falador Castle
Chance of getting a mole nose drop from the giant mole, which Wyson will trade for higher value nests
Ability to convert the altar to Zaros by using the ancient hymnal on it (the altar can then be used to swap between regular prayers and Ancient Curses). The altar can be converted back to Saradomin at any time, recovering the hymnal.
Notes: The Prayer restore feature is very hard to use during combat, as a confirmation chatbox is opened, and will be closed if you are hit. Therefore, it is unwise to rely on the shield to restore your Prayer if it is essential to survival - however it is possible, with good timing, to restore Prayer in single combat, although it is significantly harder to do so in multi-combat. The power of the shield is usable even in the other-dimensional, Prayer-draining, Abyssal plane though it may be difficult to use it simply for the amount of high-level aggressive monsters attacking the player.