Athlon optics rangecraft velocity pro radar chronograph - Athlon Optics Rangecraft Velocity Pro Radar Chronograph, 2.4 in Display

This radar chronograph ease of use is worlds above the optical type with the diffusers. You have to assemble these diffusers on sight and disassemble after use as they are rather fragile.
As well you have to be careful when firing to ensure the projectile/bullet passes between the diffuser rods to get a reading. As well, the chronograph itself has to be placed downrange of the shooting position exposing it to possible impact with a projectile.
The Rangecraft is a compact small device that you place beside your rifle on the shooting table or beside you with whatever thing you are trying to track velocity, just point it down range on its tripod and the device uses radar to deliver the velocity data to the device screen.
Price is 4 times that of the optical chronographs but very competitive compared to the comparable Garmin. In fact you see Garmin came out with an upgraded model to match the Athlon and their price is even higher than their original model.