Previous page The screen is plenty bright for any light use, indoors or outdoors, daylight or night. This is great for accurate time results, accurate to 0.001 seconds. Laser synchronization range is able to meet the most races and training needs. Next page 1 BRIGHT LED LIGHTS 2 ACCURATE TIMES 3 WIRELESS COMMUNICATION One-click startup Timer with battery can be turned on at the touch of a button. One-click reset Touch to reset to zero, no need to reset numbers one by one. WHAT'S IN THE BOX? Do I need to buy another power bank for power supply? No, you don't have to. All devices are built-in batteries and battery powered, no need to connect a power bank. To use you just need to turn on the switch on the device, very convenient. Could you be timed in the 40 yard or 60 yard? Definitely, the wireless communication range is suitable for most track distances. I want to buy three devices to use together, will there be interference? Yes, if you have purchased two or more devices, please tell us and we will teach you how to change the channel to avoid the interference. Up to five sets of devices are supported to work at the same time. Can I set the timing for multiple laps? Yes, it supports multi-lap timing, you can check the manual to set it up. Is there a box? Yes. Flight case packaging, waterproof and shockproof, easy to carry around. Please use the adapter that came with our product, if you use another adapter to charge, this may cause the timer screen to keep showing “0”