Mini Speedometer Stable Initial Speedometer High Precision Speed Tester

Features: High accuracy ensures minor measurement error and variable error. Simultaneously records 40 sets of speed and kinetic energy data. 4-sided hollow design to prevent airflow interference Built-in 350mAh lithium battery, easy to charge with the included USB charging cable. 2 kinds of clamps to fix pipe diameter of 16-37mm /0.6-1.5in Mini size is not suitable for slingshot or archery testing. There is a risk of hitting the speedometer. Front display screen for easy viewing of test data. Multiple power management and protection for safe use. Easy to carry and operate. Specifications: Operating voltage: DC 4.2V Accuracy: 1; following test errors Measurement range: 3.3 - 299 m/s Battery: 1 x built-in 3.7 V 350 mAh lithium battery. Speed measurement range: 3.3 - 1999 m/s Energy measurement range: 1-800J Weight input range: 0.1-10g Speed recording; 40 groups Kinetic Energy Record; 40 groups Working environment temperature: -140°F to 140°F (-10°C to 60°C) Size: 5.1 x 2.0 x 3.0 inches (130 x 50 x 75 mm) Package size: 6.9 x 4.5 x 3.7 inches (175 x 115 x 95 mm). Package Weight: Approx. 280g / 8.5oz Packaeglist; 1 x Speed Gauge 1 x USB cable. 1 x U-Clamp 1 x Wrench 1 x Instruction manual (English language not guaranteed)

• High accuracy, so there may be slight measurement errors and variable errors
• Simultaneously records 40 sets of speed and kinetic energy data
• 4-sided hollow design that does not interfere with air flow
• Built-in 350mAh lithium battery, easy to charge with the included USB charging cable
• Two kinds of clamps to fix pipe diameter of 16-37mm/0.6-1.5in