Combo design: Magic invisible ink pen together with black light.
Application: Secret messages, invisible tattoos, fantastic drawing in the darkness, perfect secret, personalized objects, highlighter, anti-counterfeiting.
Applying to: Able to write on paper, body, wall, wood product, metal product, cloth, etc.
Electronic power: Powered by 3 x AG3 cells ( included ).
Product Weight : 0.010 kg
Package Weight : 0.023 kg
Package Size (L x W x H) : 17 x 4.5 x 1.5 cm / 6.68 x 1.77 x 0.59 inches