Full one year warranty. The HP-27 is warranted against defects in materials and workmanship for one year from the date of delivery. This warranty does not apply if the calculator has been damaged by accident or misuse, or as a result of service or modification by other than an authorized Hewlett-Packard Customer Service facility. No other express warranty is given by Hewlett-Packard. Every key is double injection molded.
Every key is tested twice.
A quality control inspector presses the keys to make sure they feel right, then a specially designed machine exercises them to make sure they function right. Under the keyboard is a moisture-proof polyethylene barrier to help protect the inside of the calculator from coffee spills and similar hazards. The heavy gauge plastic case is contour-designed to fit the hand comfortably, and rugged enough to withstand a tumble to a hard floor. Uncompromising quality, innovative design, high quality components and precision assembly combine to produce calculators that are second to none. Hewlett-Packard reserves the right to make changes in materials, specifications or accessories without notice.