①. Noise Maker includes multiple sounds, such as cricket chirp and beep. It is suitable for pranking friends, co-workers or partners. ②. Random Noise Maker: Just turn it on, pick one of the available noise options and hide it. It will continue to sound off for a long time, working well as a prank item. ③. Easy to Hide: This random noise maker can be easily hidden in most places. It is light enough to be held by tape or a magnet. They can be used together or separately. ④. Hard to Locate: It is hard to pinpoint where the sound comes from due to random chirping intervals of about 3-45 minutes. Before it runs out of power, it may cause frustration to the person affected. ⑤. Long Lasting Battery: The battery of the random noise maker can support it to run continuously for several months.