Product size: 1509230mm. Ergonomics 15: The ergonomic included angle of 15, combined with the concave curvature of the keycap, can effectively relieve eye fatigue. Comfortable keys with mechanical switches: the keys are detachable for easy cleaning; the straight concave design on the tops of the keys lets your fingers enjoy crisp touch, which is addictive; the retro keys with dots are simple and beautiful, with a mechanical blue. switch, segment sense, stronger mechanical sense, crisp keys, eloquent. Smart shutdown and continuous battery life: It will automatically enter sleep mode if there is no operation for 7 minutes. Ten-digit screen display, large font, clear and distinctive, reducing errors and improving efficiency. Packing list: 1 calculator, 1 manual, 1 AAA battery, 1 certificate.