V4 Bestlap Lap Timer Infrared Timer Ultrared Race Track 2.2 inch Screen Professional for Car Karting PC Connection Download Details: Item: Updated Lap Timer Condition: New Apply to Car Racing and Motorcycle Racing Material: Plastic + electronic component Color: black Type: 1 set of lap timer with transmitter Countdown timer with date Lap timer set without date line 1 PC transmitter only 1 PC line only Kindly reminder: Please carefully choose the right item which you need. Thank you! The item may arrive without batteries due to international shipping policy in different countries. Please understand. We deeply know what kind of lap counter device racers need: Professional, powerful, easy to use, looks cool. 1. Additional LED indicator. 2. You can save and review 10 set oacute;in oacute;record in history. Each race record has a maximum of 99 laps. 3. With 2.2 inch large screen. 4. 30+ hours working time for each battery charge; LIR2450 is used in this device. 5. Real time clock when idle. 6. More accurate battery level indication. 7. USB connection to PC to upload or download history records. 8. Made of plastic. 9. Connect and restore the connection between the signal receiver and the reader. 10. 3x AA batteries for the siren under optimized power management, working distance and run time are secured. 11. Infrared transponder range: the optimal receiving distance is 5-10M. Manual: This product must be used with an infrared beacon (signal transmitter); Size: 80x50.5x14.9mm Power: 3.6V Li LIR2450 battery; Capacity: 110mAh, charging time: 30 min., working time: Minimum 30 hours; The device memory can store 1000x race records, each race record has a maximum. 99 laps; The user can view the last 10 oacute;re records in the race that oacute;re are stored in memory; 1. Turn on. The date will be displayed for 2 seconds and Greenwich Mean Time will be displayed after; 2. Real time clock Press time T for 5 seconds, enter time setup mode; Press T for 2 seconds, set the year by pressing wg oacute;r or wd oacute;ł, press T in year mode, it will enter month setup mode, configure the month by pressing wg oacute;r or wd oacute;ł; And set the hour, minute and seconds by the same method. Press T to return to working mode; Press S and enter race mode; By pressing the wd oacute;ł or O buttons, you will check the history records; 3. Record display mode: Press wd oacute;r or wd oacute;ł, show each lap; Press the O button to check your fastest lap, slowest lap, average lap or total time; Press T to enter clock mode; Press S to enter race mode; By pressing w oacute;ra or wd oacute;ł for 2 seconds, check the next or previous race record; 3 the device will return to clock mode after 3 minutes of inactivity; 4. Race mode; By pressing S in clock mode or record review mode, enter race mode; By pressing O or triggered by an infrared signal, the lap time starts; By pressing S again, time stops and the records will be displayed; During normal timing, if the O button is pressed or an infrared signal is received, a new lap will start; and the last lap time record will be displayed for 10 seconds; if the last lap was faster than all previous laps, the LED will flash for 5 seconds; If the last lap was slower than the previous laps, the red light will stay on for 5 seconds; 5. FAQ: 1. What happened if the time is not accurate? When the battery is very low, the RTC (real time clock) will stop working and the device will not work normally. Charge it and it will work again. 2. How do I download records to my computer? Turn off the timer and connect to your computer via USB cable; Start the timer and your computer will recognize it as FlashDisk. Work on your timer like a flashdisk. 3. Why doesn't USD work? Charge the battery for a while and try again later; 4. How to change the minimum time interval, for example 1 sec. 5 sec. 10 sec. The default time interval is 10 seconds, which means that each lap timer must be longer than 10 seconds. To change the minimum time interval, press T and enter clock mode, then press the button for 6 seconds, see LED flash and you will see the new interval, 10 - 1 - 5 - 10; 5. How to delete old records? In clock mode or history review mode, press O button for 6 seconds, the memory will be formatted, you will see the LED lights flashing at this time; 6. Why the LED does not light up when charging; Yes, the LED will not light up while charging unless the power is on. It is normal. Because the device is completely turned off when the switch is turned off. Always turn off your device before it stops charging and disconnect the USB.