How do players know when they have been hit?

When someone get shot by another player, his/her armor and phaser start to flash a white light and his/her  phaser plays a sound and vibrates, so both players are aware of the shot. Depending on the game mode, the person who get shot will lose a life and can see it on phaser’s screen. If the player has more lives, can continue to play after some seconds, otherwise the color brightness of his/her armor and phaser will be lowered and have to go and load lives and ammunition.