HP Officejet Pro X551 Printer series - Manual (Page 220)

Disposal of waste equipment by users
This symbol means do not dispose of your product with your other household waste. Instead, you should
protect human health and the environment by handing over your waste equipment to a designated
collection point for the recycling of waste electrical and electronic equipment. For more information, go
to http://www.hp.com/recycle
206 Appendix D Environmental product stewardship program ENWW