HP HP-21 - Temperature Range; Warranty; In-Warranty; Out-Of-Warranty

Temperature Range
Temperature ranges for the calculator are:
Operating 0°to 45° C 32°to 113°F
Charging 15° to 40° C 59°to 104°F
Storage —40°to +55° C —40°to + 131°F
Warranty
In-Warranty
The HP-21 is warranted against defect in materials and work-
manship for one year from date of delivery. During the warranty
period, Hewlett-Packard will repair or, at its option, replace
components that prove to be defective when the calculator is
returned, shipping prepaid, to a Hewlett-Packard Customer
Service Facility (refer to Shipping Instructions).
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 warranty is expressed
or implied. Hewlett-Packard is not liable for consequential
damage.
Out-of-Warranty
Beyond the one-year warranty period, calculators will be
repaired for a moderate charge. Al repair work performed
beyond the warranty period is warranted for a 90-day period.
Obligation to Make Changes
Products are sold on the basis of specifications applicable at the
time of sales. Hewlett-Packard shall have no obligation to
modify or update products once sold.
Shipping Instructions
Whether the unit is in warranty or out of warranty, it is the
customer’s responsibility to pay charges for shipping to the
applicable service facility listed on the Service Card. During
warranty, the service facility will, in turn, ship the unit back
to the customer prepaid, via the fastest economical means.
On out-of-warranty repairs, the customer will pay shipping
charges both ways.