Black USB 18-Key Spill-Resistant Numeric Keypad by Adesso (Model: AKB-601UB)

The mechanical or non‑mechanical mechanism that activates each key on a keyboard, such as mechanical, membrane, scissor, opto‑mechanical, or semi‑mechanical. It indicates how the key registers input and affects typing feel, durability, and noise level.

Indicates whether the product includes a non‑slip or anti‑skid base that prevents it from sliding during use. A value of "Yes" means the base is present and functional; "No" indicates absence.

A list of environmental, safety or quality certifications that a product has obtained from recognized authorities. Typical entries include RoHS, ENERGY STAR, CE, WEEE, TCO Certified, FCC, and other industry‑specific standards.