I have been using a basic Alpha Shooting Chrony for 8 years now. Its a great product.
I think they are about $150 @ Wholesale Sports.
Gives numbered shot velocities
Velocity stays on display until you shoot again
Stereo Jack for optional Remote Control or Printer
ONE String, from 2 to 32 shot memory (Numbered)
Measures High, Low and Average Velocities, Extreme Spread and Standard Deviations.
Retrieval of individual shot velocity measurements
Delete individual shots from memory (with automatic adjustment of Statistics)