A) OPERATIONS
    1)1. 5 V Operate
    2) Low Power Consumption
    3) Single or Double Key <START/STOP/RECALL> and <SET> Operation
    4) Soldering Option Default One Digit ,Two Digit，Three Digit or Four Digit
AND
Soldering Option Default Any Time 0001一9999 second or
                                  0001一9999 Minute or
                                    0001一9999 Hour   or
                                  0001一9999 Day
5)Press the Key to Set Time Setting
  Press the Key to Start Down Counting
  Press the Key to Pause, Press Again to Continue
  Hold the Key to Recall the Default Time
6) Corresponding Icons will be Turned On
7) Buzzer Sounds for 1 Minutes when Count to Zero