bk-727 electronic timer with lanyard students learn electronic time management for postgraduate entrance examination BK-727带挂绳电子计时器学生学习考研做题电子时间管理

1. Function Overview

1. This product is widely used during lunch breaks, study time, beauty treatments, the kitchen, exercise, calls, medication, meetings, and so on.

2. This product features a positive countdown function, which can display minutes and seconds.

3. The maximum countdown time can be set to 99 minutes and 59 seconds.

4. A countdown starts at midnight, with BiBi emitting sound for approximately 30 seconds.

5. Key Functions:

[t_minute] Key: Minute setting key. Hold this key down, and after 3–5 seconds, the minute value will increase rapidly, cycling from 00 to 99 to 00.

[t_SECOND] Key: The second setting key. Hold this key down, and after 3-5 seconds, the second time value will increase rapidly, cycling from 00 to 59.

[Start/Stop] key: Starts or pauses the countdown during speech.

[Clear] Key: Press this key to clear the set timing duration.

II. Usage Instructions:

1. Press the ‘分’ key to adjust the required minutes.

2. Press the ‘second’ key to adjust the required number of seconds.

3. Press “Start/Stop” to begin the timer. Press it again to pause. When the countdown reaches zero, the timer will emit a “Bi-Bi” sound.

4. Press the “Clear” button to reset the set value to zero.

5. When the value reaches zero, press the “Start/Stop” button to begin the positive timing.

6. This product can be placed on the ground using a stand, or it can be attached to magnetic metal surfaces with magnets located at its back.

III. Battery Replacement:

When the screen becomes blurry or the sound becomes abnormal, it indicates insufficient battery voltage, and a new battery must be replaced to ensure the machine functions properly.

Operation Steps:

1. Simply push the battery cover outward to open it, then remove the old battery after opening the cover.

2. Use a dry cloth to clean both sides of the new battery thoroughly; make sure it is placed facing up before inserting it into the machine.

3. Install the battery cover securely.

4. Use a 1.5V (AG13) battery.