6 digit red LED Rally Clock – all you need for most events, especially when starting out. 6 digit HH:MM:SS. Then long press the key to enter the automatic brightness function switch setting, display AL: x, short press the key to change the value, AL :O is off, AL: 1 is on, when on the display will automatically change to level 1 brightness after 19:00 in the evening, and automatically change to the brightness value in the Ld setting after 7:00 in the morning.
