U.S.PATENT PENDING #11/889,229
roduct Specification:
* It will be flashing after hitting
* Multi-layer construction
* The weight is 44g, the diameter is 42.8mm, wind tunnel is 421
* A super-bright LED embedded inside
* Du-pont surlyn cut-proof cover
* Flashing for 6 minuers /30 seconds after hitting (20% difference for the gap of IC inside the ball)
* Battery life, about 30 hours for red ball and about 20 hour for blue and green (because of the different needed voltage)
* The lithium battery of 3V
* 70% compression