As you have asked about the specifications of the Casio DBC 150-1, I am giving you information about it, check below for the details

Attributes

Band Type: Resin
Dial Code: Digital

Technical Specs

150 Page Databank
8 letters and 12 numerals per page
Memory shared between telememo and schedule memo
Auto-sort function
EEPROM memory protection
8-Digit Calculator
Constants for addition, subtraction, multiplication and division
EL Backlight with Afterglow
World Time
24 time zones (23 cities), city code display, daylight saving on/off
Daily Alarm
Countdown Timer
Measuring unit: 1 second
Countdown range: 1 minute to 24 hours
Auto-repeat Function
1/100 second stopwatch
Measuring capacity: 23:59 59.99
Measuring modes: Elapsed time, split time, 1st-2nd place times
Hourly Time Signal
Auto Calendar (pre-programmed until the year 2094)
12/24 Hour Formats
Accuracy: +/-30 seconds per month
Battery CR2016
Approx. battery life: 2 years
Module 1477

Size of case/total weight
41.5 x 37.0 x 9.5mm / 35g