Noise MakerNoise Maker Includes Multiple Sounds, Cricket Chirp, Beep & More, Very Suitable To Prank Friends, Co-Workers Or Partners. Random Noise MakerJust Turn Noise Maker On, Pick One Of The Available Noise Options And Hide It. Best Part Is It Will Continue To Sound Off For What Seems Like Forever, Worked Great As A Prank Stuff. Easy To HideThis Random Noise Maker Can Hide Easily In Most Places. It Is Light Enough For Tape Or A Magnet To Hold It.Use Them Together Or Separately To Drive Them Crazy. Hard To LocateIt's Hard To Pinpoint Where The Sound Comes From, Because Of The Random Chirping Intervals About 3-45 Minutes, Before It Runs Out Of Power, Your Victim's Sanity Will Fail. Long Lasting BatteryRandom Noise Maker Won't Die In A Few Days, The Battery Can Easily Support It Continuously Run Several Months.