【Easy to Use】Wireless laser timer, no need to connect power bank, turn on the power switch and it’s ready to work. 【Long Stand-by】Up to 10 hours of battery life for all day training uses. 【Bright LED】LED digital tube is clear and bright, no strobe, whether indoor or outdoor, day or night, the numbers are clearly visible. 【Stable Signal】Rejects any interference from visible light and works well in sunlight. 【Aluminum Suitcase】Easy to store all accessories and carry to different training grounds. Ousmile Wireless Laser Timer for Sprints, Laser Timer for Track 40 60 Yard Dash, Laser Sprint Timer System, Running Timer Racing Timer Race Clock Stopwatch for Speed Tranning