I think it is a
laser barcode scanner.
My inner part is filled with helium
My inner part is filled with helium
Laser barcode scanners contain helium-neon lasers.
Rubber comprises my epithelium
Rubber comprises my epithelium
The scanners have an external enclosure made of rubber.
If you tie me 'bout your hand
Then I'll stay closer to the ground
If you tie me 'bout your hand
Then I'll stay closer to the ground
When one holds the scanner in their hand, it is aimed at the items in the checkout counter (closer to the ground)
Else I'll go up to the sky
Else I'll go up to the sky
When the scanner is left on the rack, the beam will point upwards towards the sky.
