New Professional Racing V2 Lap Timer Recorder Receiver IR Transmitter Motorcycle Car Karting Bike Track GoKart Laptimer -- Track Day Lap Timer with Wireless IR Transmitter One transmitter and one V2 IR plastic receiver The Lap Timer is a simple and reliable lap timer suitable for all types of races and track days. Featuring a compact and lightweight design, the LCD display easily mounts to all bikes, go-karts and even cars. Lap timer with wireless infrared transmitter Pitwall transmitter powered by 2 AA batteries (not included) Included in the sale 1 included) 15 meters range (transmitter receiver) Running time: 30 hours on display, 40 hours on transmitter Easy to use, comes with instructions. You no longer have to have someone standing at the track to count the time for you. The infrared lap clock will count the lap time for you with an accuracy of 0.02s/lap, which is 30 times more accurate than the human hand. Note: Due to transportation restrictions, our products do not provide dry batteries and lithium batteries. Customers need to buy and add them themselves. Please understand. Thanks