Feature:1. RACING TIMER: Wireless digital timer, suitable for sprint racing, electric bicycles and motorcycles, skating, track and field timing, etc.2. FAR DISTANCE: Effective light distance greater than 8 meters, suitable for timing at the same starting and ending points, efficient and practical.3. 5 DIGIT DISPLAY: This timer adopts 5 digit display, precise timing, no manual reset required, and one hour timing error less than 0.001s.4. EASY OPERATION: Charging for 5 hours and using for 8 hours, the switch button is on the side of the timer, no need to connect to a mobile power source.5. COMPLETE PARTS: Including timer, turnback device, and reflectors, with brackets, easy to install and use, waterproof and shockproof, has a long service life.Specification:Item Type: Wireless TimerMaterial: Aluminum, PC, ABSTimer Power Supply: 1500mAh lithium ion battery (built in)Turnback Device Power Supply: 1500mAh lithium ion battery (built in).Package List:1 x Timer1 x Turnback Device2 x Reflector4 x Floor Stands3 x Brackets2 x Charging Cables2 x Power Adapter (Color Random)1 x Storage Box1 x User ManualNote:It is strictly prohibited to observe with your eyes directly facing the laser emission hole during work,