The Spin Rate Revolution Is Here
As the only sport radar gun on the market that measures spin rate, the Pro 3s packs the power of a full-stadium system into a take-anywhere size.
Spin rate matters. It explains why a fastball rises, why a curveball breaks, why hitters swing under a pitch they thought they had timed perfectly. And spin rate, along with velocity, is an important metric tracked by elite coaches and scouts.
The Pro 3s brings this vital performance metric to every player, team, training facility, coach, and scout - right in the palm of your hand. Now, you can capture this game-changing data from a variety of locations across the field with enhanced algorithm technology that delivers:
- Faster spin rate detection than ever before
- Greater accuracy from multiple field positions
- 150-foot range for spin rate measurements
- 500-foot velocity-detection range
- Real-time data that changes how you understand performance
This isn't just an upgrade - it's a complete transformation in how serious players, coaches, and scouts analyze the game.
Why settle for partial data when you can have the complete picture?
Every metric that major league scouts track is now in your hands with the Pro 3s.
The Stalker Pro Series sports radars are the only handheld sports radars on the market that capture Spin Rate. The Pro 3s operates with an advanced algorithm that delivers spin rate faster and more accurately from a variety of positions up to 150' (42 m) away.
Choose Exit Velocity instead of Spin Rate if you'd like to measure hit speed. This allows you to use your sports radar to measure velocities both coming towards you and moving away from you with one pull of the trigger.
Measure Over-the-Plate Velo to observe how your Velocity changes as the ball travels.
The Stalker Sport Pro 3s gives you the most accurate handheld velocity measurements available in the sports world - capturing accurate speeds from up to 500' (152 m) away.
Connect Your Entire Team To Success
Stalker Sport App
Revolutionary wireless connectivity transforms how teams analyze performance. Using the Stalker Sport App, you can now connect up to 10 iOS devices to one Pro 3s sports radar gun.
Now more people can view your stats, capture video clips of your best plays, and track statistics for the whole team. And once connected, each device can be up to 120′ (36.5 m) from the radar, allowing you to stay connected to the game from across the stadium.
See Everything The Radar Captures
View Peak Velocity, Spin Rate, and Rolldown, right from the palm of your hand. Choose Auto Mode to capture velocities automatically, or use the Start/Stop button to capture only the velocities you want.
Video Capture, Editing, And Sharing
Capture HD video in standard speed or in slow-motion to watch and evaluate later. Your stats are overlaid automatically on your video. Videos are then saved with the opportunity to edit, add notes, and share.
Powerful History
Stats can be tagged by player, and you can easily access each player’s full history in just a few clicks. Easily edit clips, add notes, then share them with anyone.
Connect and Display
Wireless Connectivity
The Pro 3s offers our longest-range wireless connectivity. Connect with up to 10 iOS devices via the Stalker Sport Radar App so coaches, players, scouts, friends, and family can get in on the action.
Speed Signs
You can also stream straight from your Pro 3s to one of our wireless LED speed signs so everyone can see your velocities. Available in 2.5 and 3.5-digit models.
What Makes the Pro 3s Better Than All Other Handheld Sports Radars?
The Pro 3s Has More Features Than Any Other Handheld Sports Radar
The Numbers Don't Lie
While competitors offer only basic speed measurements from a close range directly behind the plate, the Pro 3s delivers:
- 3 velocity measurement options (peak velocity, rolldown, exit velocity)
- Patented spin rate technology vs. no spin rate capability
- 500-foot range vs. competitors' 120-200 feet
- 10 device app connectivity vs. competitors' 0-1 devices
- Professional-grade accuracy trusted by professional coaches and scouts
Built for Champions, Trusted by Professionals
When college and professional athletes need reliable data, they choose Stalker:
- IP67 waterproof - performs in any weather condition
- 2.15 pounds - featherweight design for all-day use
- 5-hour battery life - measures every play in the game
- 2-year warranty backed by 25+ years of radar innovation
- 10ms capture speed - lightning-fast data collection
Precision From Every Position
If you have ever played around with a cheap radar, you know that velocities can’t be accurately read when you aren’t directly in line with the action. These radars force you to stand right in the danger zone directly behind the plate.
The Pro 3s changes that. With our programmable Accurate Angle Technology, it calculates true velocity even when you’re positioned up to 45° off-center. That means you can capture accurate spin rate and velocity data from the dugout, from the stands, or safely along the baseline—without sacrificing accuracy.
Pair that freedom with unmatched range and patented spin rate technology, and you’re holding the only handheld radar built to give you the complete picture of performance—any angle, any pitch, every time.
Stalker Pro 3s Specs
Speed Range
0-150 MPH
0-241 km/h
Accuracy
+/-3% of reading up to 500 ft.
Spin Rate
Spin-rate up to 150 ft.
(Note: 1000 RPM minimum)
Battery
Up to 5 hours of battery life
IP67 Water & Dust Resistant
Connect Up To 10 iOS Devices
2 Year Warranty
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