Funny Practical Joke: Got you! Play a prank on your friends and family with this hidden insect chirping sound toy. The perfect gag for annoying your little brother or sister with this hilarious trick. 4 Highly Realistic Cricket Chirps Small size 1.7 x 1.2x0.35inch , Easily hide Automatically play a sound in every 3 - 15 minutes Use 3 X LR44 batteries ,Provide Total 6 batteries ,for long lasting more than 15 days UZCIBU One Key Press Solution Power On:Long press the key until (you will hear ONE chirp) indicates the machine is working ,short press to check sound effects while machine is working .machine will paly random sound in every 3-15 minutes. Power Off:Long press the key again until (you will hear TWO chirps) indicates the machine is off .short press the key will be not applicable untill Power On again .