4 inch 4 digit Waterproof and  high quality countdown timer

which is applicable for factory, school, mansion, hospital, mart etc where accurate time displays are required.

Features Options:

There are several function modes for different purpose which are simple clock display; clock+temperature display

Master Specifications:

• 4" high LED numerics for displays in HH:MM
• Backup lithium battery is able to keep time accurate when power fails
• Daily errors: less than 2 seconds
• Time format options: 12/24 hour format selectable
• Ambient Temperature: -10~50 C; 0~95%  relative humidity;
• Two threaded holes on top & bottom for rack mounting