Usage Tips:Features: 1. ONE DEVICE, UNLIMITED CHAOS: AnnoyingPCB is the ultimate gag gift or revenge pranks. Simply activate the noisemaker and hide it. It will beep, screech, or make a cricket sound at random intervals of 5 to 45 minutes. Perfect April Fools Day pranks for your friends or coworkers. 2. COMPACT AND LIGHTWEIGHT: This super small annoying sound device can hide easily in most places. This little noise prank is inconspicuous and hard to find. 3. 4 KINDS OF NOISE: With the press of a button, you can easily change the sound. Noises include: a normal beep, a high pitch screech, and a cricket chirping. 4. EASY TO HIDE: Prank your friends, neighbors, or workmate and drive them insane! Conceal it inside a drawer with stuff in it or a cupboard near other appliances that already beep. Affix it underneath a desk, behind a monitor, inside a tissue box, or in a drop ceiling. 5. PACKAGE INCLUDED: 1 x Buzzer, 1 x Instruction Manual, 2 x Button Batteries (One For Product Itself + One For Spare), 2 x Round Double-sided Tape. Specification: Material: Alloy Color: Multicolor Product Size: 6 x 6 x 1.5cm Product Weight: 25g Package Included: 1 x Buzzer 1 x Instruction Manual 2 x Button Batteries (One For Product Itself + One For Spare) 2 x Round Double-sided Tape