Competition Electronics - ProChrono DLX

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Latest reviews

Edwin ***
21 Mar 2024
Purchased ProChrono DLX with Indoor Lighting kit. App on iPhone connected immediately to the DLX and recorded all 17 shots using the Indoor Lighting kit, without any errors, shooting indoors under ceiling florescent lighting. Double Alpha shipped my order promptly and I'm very happy with my...
Rating: (5 of 5 Stars!)
Torbjörn ***
6 Mar 2024
Lätt att använda, samt ansluta till mobilen. Gillar inte om det är minusgrader vilket kan vara en nackdel.
Rating: (5 of 5 Stars!)
Juha ***
13 Jun 2022
Works lika a charm. I have tried this Chorograph at different kind of weather conditions and every time I have received good readings. On cloudy day I just don't use those "shaders" at all. This device even worked on rainy day. Naturally if the position of the chronograph changes even a little...
Rating: (5 of 5 Stars!)
Giuseppe ***
14 Mar 2022
Perfect and easy to use.
With connection to the mobile phone quickly provides all the data of the shots, including the power factor
Very, Very great machine.
Rating: (5 of 5 Stars!)
Armin ***
13 Mar 2022
Sehr einfach zu Bedienen, und es geht auch wunderbar mit IOS.
Sehr zu empfehlen gerne wieder.
Rating: (5 of 5 Stars!)
halphen ***
7 Feb 2022
Super matériel marche impeccablement bien en Bluetooth. On peut après imprimer les résultats ,les sauvegarder sur un pc top.
Point négatif l manque juste une housse pour le transport cela aurait été beaucoup mieux et aussi un système pour fixer les 4 tiges en fer ,car la tous ce balade ,ce n'est...
Rating: (4 of 5 Stars!)


User manual: download here.

Introducing the ProChrono DLX ballistic chronograph with improved accuracy specs and built-in Bluetooth.

The next generation of our ProChrono model based on a time proven design that has been measuring “almost anything that shoots” since 1985! Great for firearms, shotguns, archery, airguns, and paintball.

Everything is included for outdoor use. For indoor use, we recommend our optional Indoor Lighting System (part# CEI-4100). Requires one 9 volt alkaline battery for operation (not included).


  • On-board Bluetooth connectivity, and more options with FREE apps for iOS, Android, Kindle, PC, and Mac
  • Internal and external refinements with updates to the circuitry and enclosure design
  • Built in full featured operating system with multiple shot string memory and statistics
  • Sensing system compatible with a wide variety of light conditions and projectiles
  • Faster internal shot clock for improved accuracy to +/- .5% or better
  • Made in the USA quality at an affordable price
  • 2 year warrantee against defects in material and workmanship, and a 1/2 price repair guarantee
  • Over 30 years of experience in chronograph design and manufacturing
  • Replaceable Alkaline 9 volt battery power (not included) for 20+ hours of operation
  • Quality accessories and replacement parts at a reasonable price
  • Made in USA


  • Velocity Range: 20 – 9,999 feet per second
  • Temperature Range: 20-100 degrees Fahrenheit
  • Size: 16x4x3-1/4 inches
  • Weight: 2.1 lbs
  • Battery Required: One 9-volt alkaline battery
  • Battery Life: Approx. 20 hours of operation
  • Current Consumption: Approx. 20mA
  • Mounting Hole Thread: 1/4x20
  • Guide Wire Size: 3/16x16 inches
  • Memory Capacity: Up to 9 strings of up to 99 shots each
  • Minimum Time Between Shots: 500 mSec
  • Shot Timing Resolution: 31 nSec (8000 counts @ 4,000fps) Crystal Controlled
  • Accuracy: +/-.5% of measured velocity or better
  • Bluetooth: BT2 and BT4LE

Digital Link App Downloads:

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