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MAIN UNIT SETUP (Fig. 1) 

PROGRAM THE COMPUTER (ALL CLEAR)

1. A battery is already loaded in the main unit when purchased.

2. Hold down the SET button 

 and RESET button 

 simultaneously for more than 3 

seconds to program the computer and clear all data. 

IMPORTANT: Be sure to program 

the computer before it is be used, otherwise the computer may run errors.

3. The LCD segments will be tested automatically after the unit is programmed.

4. Press MODE button 

 to stop LCD test, then the flickering "KM/H".

UNIT SELECTION

Press MODE button 

 to choose KM/H or M/H. Then press the SET button 

 to store selection.

WHEEL CIRCUMFERENCE

1. Roll the wheel until the valve stem at its lowest point close to the ground, then mark this 

first point on the ground. 

(Fig. a)

2. Get on the bike and have a helper push you until the valve stem returns to its 

lowest point. Mark  the second point on the ground. (Sitting on the bike achieves a more 

accurate reading since the weight of the rider slightly changes the wheel circumference).

3. Measure the distance between the marks in millimeters. Enter this value to set the wheel 

circumference. 

Option: Get a suitable circumference value from the table.

 

(Fig. b)

4. Adjust the wheel circumference as the data setting process.

5. Unit will change to the normal operation after this circumference setting.

FUNCTIONS (Fig. 3)

Current Speed

 

0.0–199.9Km/h (120.0 Mile/h), 0.1Km/h (Mile/h), +/- 1%

The current speed is always displayed on the upper set when riding. It displays current 

speed up to 199.9 Km/h or 120.0 Mile/h (for wheel diameters over 24 inches).

CLK: 

12HR or 24HR Clock 

1H00M–12H59M or 0H00M–23H59M, 1 Minute, +/- 0.3%

It can display the current time either in 12HR or 24HR clock.

DST:

 Trip Distance 

0.00–999.99Km (Miles), 0.01Km (Mile), +/- 0.01%

The DST function accumulates the distance data from the last RESET operation as long as 

the bike is being ridden.

RTM: 

Riding Time 

0M00S-59M59S, 1 Second, 0H00M-99H59M, 1 Minute, +/- 0.03%

1. The RTM totals the riding time from the last RESET operation.

2. It displays in 1 second increments when RTM is less than 1 hour and changes to 1 Minute

increments after 1 hour. It will restart from zero after 100 hours.

AVG: 

Average Speed                         0.0–199.9Km/h (120.0Mile/h), 0.1Km/h (Mile/h), +/- 0.1%

1. It is calculated from the DST divided by the RTM. The average data counted is from the 

last RESET to current point. 

2. It will display "0.0" when RTM is less than 4 seconds.

3. It is updated about one second when RTM is over 4 seconds.

TROUBLE SHOOTING   

Check the following before taking unit in for repairs.  

MAX:

 Maximum Speed

 

0.0–199.9Km/h (120.0Mile/h), 0.1Km/h (Mile/h), +/- 1%

It shows the highest speed from the last RESET operation.

TMP: 

Current Temperature °C / °F                                                -10°C ~ 60°C (14°F ~ 140°F)

ODO: 

Odometer                                                           0-99999Km (Miles), 1Km (Miles), ± 0.1%

The ODO accumulates total distance as long as the bicycle is running, the ODO data can be 

cleared by the All Clear operation only.

ODO1, ODO2: 

Bike1 odometer, Bike2 odometer 

0.0–99999.9 Km (Miles), 0.1Km (Mile), +/- 0.1%

1. The odometer cumulates the total distance as long as the bike is running.

2. This computer design has 2 wheel circumference memories to calculate data for 2 bikes. 

The odometer is separated for each bike.

3. It displays one ODO data only when the bike is selected in the current status.

T.RT: 

Total Riding Time 

0H00M-999H59M, 1 Minute, +/- 0.003%

The T.RT totals the riding time from the last ALL CLEAR operation. 

: SCAN

1. Auto-Scanning Display Mode.

Press the MODE button 

 till the       symbol is displayed. The computer will change the 

display modes in a loop sequence automatically every 5 seconds.

2. Fixed Display Mode.

Press the MODE button 

 to turn off the       symbol and select a desired display mode; the 

computer will stop the auto-scanning display operation.

  /    : Speed Pacer

It flashes the      speed pacer arrow while the current speed is higher than the average speed 

and the down arrow       flickers conversely.

BUTTON AND OPERATIONS

MODE BUTTON 

 

Quickly press this button to move in a loop sequence from one function screen to another. 

LOCK/SET BUTTON 

Hold down this button 2 seconds to get in or out the setting screens when you want to reset 

to bike, or the current time of the CLK.

LIGHT/RESET BUTTON 

1. Light for 4 seconds after each press. 

(Fig. 5)

2. The symbol "     " will apper to indicate the EL back-light functuon is at working status.

3. Hold down the “RESET” button 

 till the LCD digit is blank, then release it.

The computer will RESET the DST, RTM, AVG, MAX.

CLOCK SETTING 

1. Change the LCD display to CLK screen.

2. Press the SET button 

 to enter the clock adjusting screen to setting the clock.

3. A quick press of the MODE button 

 to select 12HR or 24HR.

4. Adjust the clock data as the data setting procedures.

RESET OPERATION (Fig. 4)

1. Hold down the RESET button 

 till the LCD screen is blank, then release it. The 

computer will reset AVG, DST, RTM and MAX  data from stored values to zero.

2. It cannot reset ODO, T.RT, CLK.

AUTOMATIC START/STOP

1. The computer will automatically begin counting data upon riding and stop counting data 

when riding is stopped. 

2. The flickering symbol "     " indicates that the computer is at start status.

KEY-LOCK (Fig. 2)

To protect you computer, you may can press the lock button to lock the MODE button 

 

Whenever you press the lock button, the functions of the MODE button 

 will be disabled. 

You may can unlock the MODE button 

 by pressing the lock button 

 again. 

AUTO SLEEP MODE 

To preserve battery, this computer will automatically switch 

to sleep mode and just displays 

the CLK data when it has not been used for about 15 minutes. The power will be turned on 

by pressing the SET

 

button 

.

LOW BATTERY INDICATOR 

1. The symbol "       " will appear to indicate the battery is nearly exhausted. 

2. Replace battery with a new one within a few days after the symbol was appeared, 

otherwise the stored data may be lost when the battery voltage is too low.

BATTERY CHANGE (Fig. c)  

1. All data will be cleared when battery is replaced. 

2. This computer allows you to re-key in data of ODO which you have had rode after 

replacing battery. 

3. Keep record the ODO and T.RT data before you remove the old battery. 

4. Replace with a new CR2032 battery in the compartment on the back of the computer 

with the positive (+) pole toward the battery cap. 

5. Program the main unit again.

PRECAUTIONS 

1. Do not leave the main unit exposed to direct sunlight when you don't ride the bike.

2. Do not try to disassemble the main unit or its accessories.

English

 

Sensor: 

No Contact Magnetic Sensor. 

 

Battery Type: 

3.0V Battery X 1 (Typical No. CR2032)     

 

Battery Operating Life: 

CR2032 in Main Unit  About one year 

 

  (based on the average riding time of 1.5 hours per day)

 

  CR2032 in Speed Transmitter Around 24000km

 

Dimensions/Weight: 

34 x 52 x 15 mm / 21g

 Wheel Circumference Setting: 

1mm - 3999mm (1mm increment)

 

Operation Temperature: 

0°C ~ 50°C (32°F ~ 122°F)

 

Storage Temperature: 

-10°C ~ 60°C (14°F ~ 140°F)

3

4

RESET  OPERATION (DST=0, RTM=0, AVG=0, MAX=0) 

Bike 1 or Bike 2

1

+1

 CYCLE COMPUTER

MODE

LOCK/

SET

LIGHT/

RESET

BATTERY CHANGE

Tire Size

Circumference 

Nunber

18 Inch 

1436 mm

20 Inch 

1596

22 Inch 

1759

24x1.75 

1888

24 Inch 

1916

24x 1  3/8 

1942

26x1.40 

1995

26x1.50 

2030

26x1.75 

2045

26x1.95 

2099

26x2.1 

2133

700C TUBULAR 

2117

700x20C 

2092

700x23C 

2112

700x25C 

2124

700x28C 

2136

700x32C 

2155

700x35C 

2164

700x38C 

2174

27.5 Inch 

2193

28 Inch (700B) 

2234

28.6 Inch 

2281

b.

POPULAR TIRES 

CIRCUMFERENCE 

REFERENCE TABLE

15m

WHEEL CIRCUMFERENCE

a.

2nd                         1st

EL Back-light

Data Setting Mode

c.

0~3

2s

OK!

2s

MODE

Low battery indicator

ON

OFF

Key-lock off

+1

0~3

0~9

0~9

+1

0

~

23

0

~

5

3s

+


CLOCK 

DST  

RTM 

AVG 

MAX  

TMP 

ODO 

TRT  

SCAN

SEGMENTS

LCD

AUTO TEST

ALL CLEAR UNIT SELECTION BIKE 1, BIKE 2 SETTING

CIRCUMFERENCE SETTING

CLOCK SETTING

2s

OK!

END SETTING

+1

0~9

0~9

+1

0~9

0~9

ODO  SETTING

TRT  SETTING

2

 Key-lock

2s

DST 

RTM 

AVG 

MAX

2s

OK!

DST 

5

6

2s

3. Check relative position between sensor, magnet and main unit periodically.

4. Don’t use thinner, alcohol or benzine to clean the main unit or its accessories when 

they become dirty.

5. Remember to pay attention to the road while riding.

WIRELESS 

RESET

LIGHT

LOCK

SET

1. Is the battery dead?

2. Is there incorrect battery 

installation?

1. Is it at the MAIN UNIT SETUP or 

another   setting screen?

2. Are the relative positions and gap 

between sensor and magnet correct?

3. Is the circumference correct?

4. Is the sensing distance too long or 

the installation angle of the sensor 

incorrect?

5. Is the sensor battery nearly 

exhausted?

6. Is any strong interference source 

nearby?

Did you leave main unit under direct 

sunlight when not riding the bike for a 

long period of time?
Is the temperature below 0

°

C (32

°

F)?

1. Replace the battery.

2. Be sure that the positive pole of the 

battery is facing the battery cap.

1. Refer to the setting procedure and 

complete the adjustment.

2. Refer to 

Installation

(

Fig

.

C-a.

)and 

re-adjust position and gap correctly.

3. Refer to "Circumference Setting" 

and enter correct value.

4. Refer to 

Installation

(

Fig.C-b

.)adjust 

distance or angle between the main 

unit and the sensor.

5. Replace with a new battery.

6. Move away from the source of 

interference.

Refer to the "Main Unit Setup" and 

initiate the computer again.
Place main unit in the shade to return 

to normal state.

No adverse effect on data.
Unit will return to normal state when 

the temperature rises.

Main unit No 

display

No current speed 

or
Incorrect data

Irregular display

LCD is black

Display is slow

PROBLEM 

CHECK ITEMS 

REMEDY

Auto Sleep and

 Key-lock on

4403006671

Gasket

Battery 

CR2032

Battery

cap

3V

CR2032

+

3V

CR2032

+

Screwdriver

Screw

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