Wireless pocket chronograph FX Radar Pocket Chronograph V2. The wireless pocket chrono FX uses the Doppler phenomenon to measure speed and is therefore a radar and is not so dependent on light conditions. The radar is controlled using a phone application (Android, IOS), which is free to download. Three AAA batteries are required to power the radar.
If you're looking for an affordable, hassle-free, easy-to-use device for your air rifle, air pistol, airsoft gun, bow or crossbow, then the FX Radar Pocket Chronograph V2 is the ideal device.