Description of SP Pro Timer 2 The best wireless timer on the market that could help improve your shooting and training. The SP Pro Timer 2 is now operummy momentrate on Android mobile system, no more wiring for stage setup. Easy to use, a simple system that could help you train your shooting skills.Please check User Manual for setup instruction.User Manual https://www.youtube.com/watch?v=Hn6cdgty3pc

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