Uses 3*AG3 button cell (included)
Loop silicone to fit Fingers， Pens， pencils， Tools， etc
Push button ON/OFF
Each package with 4pcs in assorted colors: white， red， blue and green
Each Finger Beams are all have their own single color LED
Great for parties!

Dimension: 40*15*14mm
Weight: 6g

Package dimension:50*165*20mm
Package weigth:30g