The Antennae On The Firefly'S Head Can Detect The Presence Of Light. When Light Shines On The Left And Right Antennae R1 Or R4, The Transistor Q1 Or Q2 Is Turned On And The Corresponding Installed Leg Motor Starts To Vibrate, And The Firefly Will Move In The Direction Of Sensing The Light. Tail Breathing Light, Using Lm358 Op Amp Ic To Form A Breathing Light Circuit, Simulating The Luminous Effect Of Fireflies Slowly Lighting Up And Then Extinguishing. It Embellishes The World Just Like Real Fireflies In A Dark Environment. Use Lm358 Op Amp C To Form A Breathing Light Circuit, Simulating The Glowing Effect Of Fireflies Slowly Lighting Up And Then Extinguishing. It Embellishes The World Just Like Real Fireflies In A Dark Environment. Easy To Carry Professional Installa Product Name:Photosensitive Firefly Robot Kit Product Model:TJ-56-606 Working Voltage:DC 3V (CR2030 Button Battery) Photosensitive Device:Photoresistor Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:Plastic Package Contents: 1 Set * Photosensitive Firefly Mobile Robot Diy Welding Parts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.