Casio 3231 - Page 3

Operation Guide 3231
E-20
Illumination: EL (electro-luminescent) backlight
Battery: One lithium battery (Type: CR2016)
Approximately 2 years on type CR2016 (Assuming 2 seconds light operation
and 20 seconds alarm operation per day)
Note: Frequent use of the backlight shortens the battery life noted above.