These chronos' are extremely good and versatile. They allow me to test guns while on the move and in various locations around game sites without having the burden on a power cable. Converting speeds from metres to feet and back is a little dificult, as it is not written in the instructions how to do this. Very solid construction, has survived many bashes, although it has been shot a couple of times, which causes damage. Not too bad from an airsoft gun, but an air rifle may well do a lot more damage. Overall an excellent piece of kit and well worth the money for what you get.

This is the most common Chrono I've come across at various sites, and is well worth the money if you're interested in modifying your own kit without the hassle of turning up to site and not being able to use something until next game day because you had no way of knowing what it was running at until you arrived. Also good if you regularly service other peoples kit as well as your own/ have been designated a 'team armourer' by your lazier friends! The various modes are useful for avoiding the need for calculators and the like; allowing you to work out what spring 'M' rating you've been supplied with if you were otherwise unaware. The additional collar does help channel your barrel into the Chrono a bit, but it's down to the user to line things up properly, otherwise you end up getting null readings (especially true of longer RIF's - having a tripod to mount this on is a real help if you don't have someone else to hold it for you/ something stable to rest it on) - Submitted by Stu Mortimer