The sticker (it is rectangular and black, with white printing of what appears to be a rolling trash bin with a large X across it. )
it is there to remind you to
not dispose of this device in the regular garbage can, but rather consigning
them to an E-Waste bin.
These products have traces of lead and all electronic
components these days are required to be properly disposed of.
Clear-Com takes pride in complying with a law designed to
protect our environment.
search online for WEEE ( Waste Electrical and Electronic Equipment Directive)