This digital solar watch allows you to set the time to a 12-hour or 24 hour-cycle, it also has a stop-watch funtion as well as an alarm.
Measurement: 4.3cm x 3.8cm
Weight: 75grams
Made in China
Instruction:

Normal display mode: hour/minute, date/month, 12/24h convert
Button:
S1: change mode
S2: set time
S3: light
S4: alarm
Change status:Press and hold S2 to adjust time/date/year format.
Press S1 to switch between different modes and adjust accordingly by pressing S4.
To operate the stopwatch function:Keep pressing S1 until the screen shows STW.
Press S4 to start/stop.
Press S2 to reset.
To operate the alarm:Keep pressing S1 until the screen shows AL1, AL2 or AL3.
Press and hold S2 to adjust.
Press S4 to activate/de-activate alarm.
To change the ligh colour:Press and hold S3. Release at the colour you want.