Usage Tips:Game buzzers: you will receive 4 packs buzzer light buttons with light and sound, the shell color is black and red, side is blue with a big white "x" on top, increase lots of to the games and easy to use (recommended age: 12 ages and up)Funny game props: game buttons are Perfect for pranks, desk gadgets, home game at night, club revelry, gags and more; Also can be applied as party competition props for adults, and girls, the participants can be actively encouraged to participate in the competition by using quiz buzzersMake quizzes more interesting: use button buzzers , can mobilize the enthusiasm of students, help involved and positive thinking, that will make classes much more entertaining and activityDurable and portable: buzzer sound buttons are made of durable and resistant ABS material, even dropped many that still work, lightweight and easy to carry, measures . 97x112x116mm, dimension not too small or too , suitable for any agesEasy to use: contest buzzers are powered by 2 AA batteries (batteries not included), after installing the batteries, simply press the red buzzers to light up, and game buzzers have appropriate volume, loud enough without sounding too loudcolour: as shownMaterial: ABSPackage Contents:4 x Game BuzzersOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.