Features on this Lap Timer:Extension cord 1.5m for all appliation; the timer can now be used on cars, motorcycles, dirt-bikes, minbikes, bicycles, skateboards, snowboards and much much more...The can be placed anywhere you want. This bidding comes with the transmitter & the timer. So you no longer need anybody to stand by the track to count the time for you. An infrared lap timer will count the lap time for you at 0.02s/lap accuracy which is 30 times as accurate as human hand. The Lap Timer (Receiver):The LCD shows one lap backward;: The LCD shows one lap forward;: Summary; Slowest lap time, fastest lap time, Total time and average lap time;:A two-second press will clear the memory and turn on the signal receiver,so the timer will start to count when it passes the signal wall; A short press will stop the timer from counting,and LCD turns to last record; Note: Batteries need to be replaced after 5 hours of use to avoid weak signals; Take the batteries out of the box during long idle; It is forbidden to point the laser to eyes, keep the product away from children. The time tolerance of this device is 0.0035 seconds for each lap; (CPU) This device is designed for track day and trainers; It has all basic function that is required for track day. Max Lap time and Max total time: 99 minutes 59 seconds; When there is continuous signal, only the first signal will be counted; The signal receiver is built in the timer, make sure the receiver is exposed to the "Signal wall" created by the transmitter; The laser pointer helps to build the signal wall; Make the "wall" as vertical to the track as possible; When you are not able to expose the signal receiver to the"Signal wall", try to turn the "wall" to different angles Colour:Black Material:plastic Package Contents: 1 x Transmitter<br /