The phrase "rumoured specifications" means the information about a product's features and details that is circulating as a rumor or unconfirmed information. Full definition
Other rumoured specifications include 1.4 GHz octa - core Snapdragon 430 processor with Adreno 505 GPU GPU. (techandroids.com)
Rumoured specifications include a QHD AMOLED screen and hefty processor, plus the ability to record 4K video so we await with baited breath to see if they are true. (pocket-lint.com)
Other rumoured specifications point to 6 GB of RAM and 64 GB of storage. (dealntech.com)