The Quick Verdict
Get the Blue Tees Captain Air. At $49 more than the Callaway CSi Pro, you're getting a meaningfully better display, USB-C charging, and a suite of extras — shot tracking, Find My Rangefinder — that the CSi Pro doesn't have. The CSi Pro makes sense if you want a lighter, pocketable unit with Callaway's pin acquisition feedback and you genuinely don't care about the display quality or charging convenience. Check price at Amazon →
What They Have in Common
Both are 6x rangefinders with 1,000-yard range and ±1-yard accuracy, both have slope with a legal-play switch, and both carry some level of water resistance. At their core, they're doing the same job: give you a number you can trust before you pull a club. The differences are in how they do it.
Where They Differ
Display and Optics
This is the biggest split between these two. The Captain Air uses a dual-color HD LED display — red and black — which reads dramatically better in low-light conditions than a standard LCD. If you play early mornings, late twilight rounds, or just shaded tree lines where it gets dark fast, that matters. The CSi Pro runs a conventional LCD, which is fine in good light but tends to wash out or flatten in shadows. Nobody reads a rangefinder in direct sunlight anyway — they read it in the shade of their palm or under a hat brim — so display contrast is a real-world issue, not a spec-sheet vanity.
The CSi Pro's optics are multi-coated, which helps with clarity and glare reduction, and that's a genuine advantage. Blue Tees describes their glass as "6x HD," but beyond that the spec sheet doesn't give us much to compare on the optics side specifically.
Battery and Charging
The Captain Air is USB-C rechargeable, which means you charge it like your phone. No hunting for CR2 batteries at a gas station when you forgot to check before your tee time. The CSi Pro's battery situation isn't published, but the form factor and price point suggest a CR2 or similar cell. That's not a dealbreaker — CR2s are at every pharmacy in the country — but USB-C is just easier, and a built-in battery means you're not buying replacements over a five-year ownership window.
Extra Features
The Captain Air brings shot tracking and Find My Rangefinder. Shot tracking is one of those features you either use obsessively or forget about completely, but it costs you nothing to have it. Find My Rangefinder is clever insurance — if you set the unit down on the cart and it drives off, you've got a way to locate it. Probably a feature most people activate once, forget about, and then desperately need exactly one time.
The CSi Pro counters with CSi Club Selection — a mode that actually suggests which club to use based on the slope-adjusted distance. That's either useful or annoying depending on how much you trust an algorithm with your bag. It also has scan mode and PAT vibration lock for confirming you've found the pin, which is a satisfying feature to have when you're not sure if you've locked the flag or the cart barn behind it.
Build and Feel
The CSi Pro weighs 5.6 oz and measures 4 × 2.75 × 1.5 inches. That's a compact, pocketable unit — easy to slip into a back pocket instead of a pouch. Blue Tees hasn't published weight or dimensions for the Captain Air, so this one's hard to compare directly. The CSi Pro also carries a 2-year warranty, which is worth noting. Blue Tees' warranty terms aren't in the spec data here.
Who Should Buy Which
Get the Blue Tees Captain Air if:
- You play a lot of early morning or late-evening rounds where display brightness actually changes whether you can read the number
- You want USB-C charging and never want to think about batteries again
- You're the kind of golfer who actually logs shots and would use a tracking feature
- You play somewhere with a lot of tree cover or shade and you've squinted at a washed-out LCD before
Get the Callaway CSi Pro if:
- You want the lightest, most pocketable option and you're used to slipping a rangefinder in your back pocket rather than hanging it on the bag
- The club selection suggestion feature actually sounds useful to you — it's a real differentiator for golfers who are still working out their distances with a new set
- You're a 20-handicap who's fine with a conventional display and would rather pocket the $49
- You play in good light at well-maintained courses and the display gap doesn't move you
The Bottom Line
These two are closer than the spec sheets make them look, but the Captain Air earns its $49 premium. The LED dual-color display is a genuine upgrade over a standard LCD, USB-C charging removes a small but real recurring hassle, and the extra features add up. The CSi Pro is a solid, compact rangefinder with good optics and a club-suggestion mode that some golfers will find genuinely useful — but it's the better deal for someone who specifically wants a lighter unit or finds the Captain Air's extras superfluous.