Features:

3 buttons
- Down Button
- Enter/Power Button
- Up Button

5 modes of operation
- Water depth measurement (Corresponding icon: DEPTH)
- Water temperature measurement (Corresponding icon: WATER)
- Air temperature measurement (Corresponding icon: AIR)
- Timer mode 1 (10 minutes mode) (Corresponding icon: T1)
- Timer mode 2 (0 to 19 minutes mode) (Corresponding icon: T2)

4 user settings (With memory function, settings will not lost after power-down)
- Transducer offset (Corresponding icon: OFFSET)
- Shallow water alarm (Corresponding icon: )
- Deep water alarm (Corresponding icon: )
- Unit selection (Metric or English) (Corresponding icon: , , and )

Power Source:
- Internal rechargeable battery
- External 5V, 1A adaptor

Operation instructions:

Power Off:
When the unit is powered on, press "Enter/Power Button" and hold for 3 seconds to turn it off.

Power On:
- When the unit is powered off, press "Enter/Power Button" and hold for 1 second to turn it on.
- After unit is powered on, the unit will enter "Water Depth Measurement" mode right after the start-up
Sequence.

Change of operating mode:
- When the unit is powered on and operating in 1 of the 5 modes of operation, press "Up Button" or "Down
Button" to change the operating mode. Corresponding icon of current operating mode will be visible.

Change of user settings:
- When the unit is powered on and operating in "Water Depth Measurement", "Water Temperature
Measurement" or "Air Temperature Measurement" mode, press "Enter/Power Button" to enter the user setting
Adjustment menu.
- Press "Up Button" or "Down Button" to select the user setting to be adjusted, corresponding icon of selected
Item will be flashing, the numerical field will show the current value of selected item.
- Press "Enter/Power Button" to enter the value adjustment mode, the current value will be flashing, press "Up
Button" or "Down Button" to change the value.
- Press "Enter/Power Button" to confirm the change of value, the user setting values will be stored such that they
Will not be changed after power down and power up.
- If the change of value is not confirmed by pressing "Enter/Power Button", all user settings will not be changed.
- The unit will go back to the operating mode before entering the user setting adjustment menu if no key is
Pressed within 10 seconds.
- The software inside each unit will limit the user settings in order to avoid contradictory settings (for example,
Deep water alarm level < shallow alarm level) to be used.