What Are the Features of a Slot Machine?


Various types of slots come with different features. A classic fruit machine may have only a special symbol and a bonus game, while modern video slots are almost always equipped with a wild, scatter, and bonus game. Some may even have different reel setups. You should be aware of these features so that you can make the best decision when choosing a slot machine.


Slot symbols have special significance to many people. In many cultures, the number seven is a lucky number, and landing triple sevens on the reels is said to bring the biggest cash prize. Horseshoe symbols are also considered lucky, though they are not as common as they used to be. However, the lucky seven continues to be one of the most popular symbols on slots.

Slot symbols are usually themed to fit the game. For example, a slot game with a theme of “sea life” will have slot symbols featuring fish. On the other hand, the low-paying symbols will typically be card ranks or suits. Classic slot symbols include bars, diamonds, and the number seven.

Payback percentage

Knowing the payback percentage of slot machines is important if you want to maximize your winnings. Some players assume that the lower the payback percentage, the better the game is, but this isn’t always the case. Payback percentages vary by casino and denomination. For example, a penny slot pays back less than a dollar machine. A video poker machine, on the other hand, pays out more than ninety percent.

To find out the payback percentage of a slot machine, you’ll want to compare average payouts for all machines in the casino. These percentages are averaged over a million spins, so the actual payout may be lower or higher than advertised. Payback percentages can also differ significantly, depending on the payout structure and player experience.

Bonus rounds

Bonus rounds on slot machines are special games that are triggered by specific symbols on the reels. These special games are usually free to play and can help players boost their winnings in the base game. Some of these rounds also have retriggerable symbols, which will increase the players’ chances of winning. Many of these special rounds can also give players free respins, extra symbols, or free spins. In addition, these games increase players’ chances of winning the jackpot.

In order to trigger these rounds, players need to land a certain number of symbols on the reels. Landing three scatters in the free spins round will award you with 10 extra spins. Retrigger symbols will also help players extend the duration of the bonus round.


Random number generators (RNGs) are used to create slot games and are responsible for keeping the game fair. The RNG can be either internal or external to the game programming. RNGs have different properties and continue to evolve. In general, two types of RNGs are used in slot games: software-driven RNGs and hardware-driven RNGs.