ES14 Golf Launch Monitor. Bough for £380 brand new and only been used half a dozen times to nail down my yardages before I stopped playing golf.

Great piece of kit for practice at the range. Used with ES14 app to get average distances with every club in the bag. App shows total distance (select total or carry) in yards or meters, smash factor, club speed, ball speed, and launch angle. Each session can be saved in the app for future reference. Also has a fun game feature that gives random yardages to try and hit to with different club for practice of different types of shot.