I have several digital clocks, here is how to set or change the time and parameters of each.

Currently in smi livingroom

• Two display modes: (1) Display time only, (2) Display time, date, and temperature in a cycle
• Five brightness settings
• Two alarms
• Voice controlled wakeup
• USB power with 3 AAA battery backup

Start when showing time.

Display mode setting: long press '+' to switch display mode (1) time only, (2) cycle through time, date, temp
Temperature unit setting: long press '-' for F or C
Brightness adjustment: short press SNOOZE, cycling through brightness 1-5.
Night Mode: display switches to low brightness mode 22:00 - 06:00
Don't disturb mode: long press SNOOZE. Turns off display, turns off voice wake-up (voice wake-up when in battery-only mode). Press a key to exit.
Long press: is press-and-hold for 3 seconds

Start when showing time.
tap clock button:displays alarms (1) or (2) (switch between them)

• Press +/- to set alarm on/off
• Press S again to set alarm of the corresponding group
• Tap +/- to set hour
• Tap S, tap +/- to set minutes
• Tap S, tap +/- to set frequency ('1-5' Mon-Fri, '1-6' Mon-Sat, '7' everyday)
• Tap S, exit setting

When alarm sounds, tap any button to start snooze; long press SNOOZE to turn off alarm

Press and hold TIME button and then while keeping it pressed:

• Tap HOUR button to advance the hour. PM indicator will light when in PM times.
• Tap MIN button to advance the minute.
• Release TIME button when correct time is showing

• Follow procedure for setting time, while holding ALARM button.
• To use alarm, slide ALARM ON/OFF button to ON or OFF. Alarm indicator dot is visible when alarm is ON.
• When alarm sounds, press SNOOZE to stop alarm for 9 minutes.

Uses 2 AAA batteries. When power is out, ALARM and TIME settings are retained; display is off; and alarm will sound if set.