SET OF FOUR You will receive 4 pieces buttons with light and sound. XL game answer buttons are made of ABS material, can be applied for a long time, each of them is approx 3.7 x 4.2 x 4.6 inches(L x W x H), proper size to use and carry. EASY TO USE Only you simply press the red buzzer to make it light up, the game answer buzzer will buzz loudly. Easy to operate, and even children can use it. PERFECT FOR GAME NIGHTS The game answer buzzer is perfect for fun pranks, home games at night, club activities, a variety of parties, competition props and can increase lots of fun to the games. NOVELTY TOY GIFT Ideal for the office, dorm rooms, liars, office gadget, stocking stuffer for adults, men or women, jokes, pranks, college dorm rooms, adult birthday gifts, adult Christmas gifts, adult prank and gag gifts, and even the kitchen table. WIDE RANGE OF USES Make classroom quizzes more fun. Actively encourage contestant to join in the competition with this quiz game buzzer. Using answer buzzers for classroom can again help to engage students in the process and aid in the memory. There's more.