Photosensitive automatic movement The tail breathing light flashes automatically simple circuit DIY Manual Soldering Firefly<br><br>Name: Photosensitive Firefly Robot Supply voltage: DC 3V Battery type: CR2032 button battery (product without battery) Sensing device: photoresistor Power source: flat motor 3V Tail Lights: Blue LED 5MM Depending on the batch, the appearance and color of electronic components , which does not affect use. Colour:Green Material:PCB+electronic components+plastic<br><br>Package Contents: 1 x Electronic Soldering DIY kit<br><br>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.