For all orders exceeding a value of 100USD shipping is offered for free.

Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.

Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.

* Aluminum alloy, stainless steel material, support rod, speed measurement, energy measurement, speed energy, view records, can save 80 sets of data and view the average value.

* This product is a projectile with a speed of 1 to 2000 meters per second, and the speed is accurate. (FPS range 30-6500)

* It has the advantages of large effective sensing area, convenient use and high sensitivity.

* Strong adaptability to ambient light (the darker the ambient light, the better the performance of the machine. If it is used under strong light, it is recommended to install a range hood)

* It is mainly used to learn and experience the high-speed data processing ability of single-chip microcomputer, which can measure the flight speed of various projectiles. Such as table tennis, badminton, bow and arrow, physical acceleration experiment, projectile free fall experiment, toy speed measurement, plush toys for children, etc.