Features:1.So Small Yet So Sinister: How can one small noise device create such havoc. This annoying beep prank will become your favorite of all pranks and practical jokes. Super easy to use. Simply turn it on, pick a sound and hide it. All that's left to do is watch and hear your victims lose their mind.2.Why Ours? Most other annoying beep prank noise makers just don't last as long as ours. They use a battery that lasts a few days, we use a battery that lasts months and even years. Keep the beeping laughs going. Makes a great revenge prank, joke or gag.3.Multiple Sounds: Why limit yourself to a sound machine noise device with only one sound? Ours has multiple different noise options, it will have people running for their sanity.4.Perfectly Timed Intervals: Let's face it, this might be the number one complaint form all others. Some go off way too often, while others don't go off enough. If it goes off too often it will be easily found, if it doesn't go off enough it won't be annoying enough. We've timed ours perfectly, at least we think so. 5.How to Use: Turn it on, pick a sound and hide it. So easy you might want to buy two. Hide them at a distance from each other for double the laughs. Once they think they have located the sound, the other one goes off and throws them off. Makes a great office gag or any other work place location. Specifications:Material:MetalProduct Size:4.3*2.3*1cmWeight:about 12.7gNotes:1.Due to the effects of light and shooting angle, the actual color of the item may differ slightly from the color shown on the picture.2.Due to manual measurement, please allow 1-3cm measuring deviation.Thank you for understandingincludes:1 * Annoying Beeper Toy