Blue Tees Series 4 Ultra vs Nikon COOLSHOT 40i GII

The Quick Verdict

These two sit $49 apart but come from different tiers — the Blue Tees is the premium option, the Nikon the value play. The Blue Tees Series 4 Ultra wins on display and feature set; the Nikon COOLSHOT 40i GII wins on accuracy and optics pedigree at a lower price. If you want the better reading experience and don't mind spending the extra $49, get the Blue Tees. If you want tighter accuracy numbers and a brand with 50 years of optics behind it, the Nikon is the sharper buy.

What They Have in Common

Both shoot at 6x magnification, both have slope with a tournament-legal switch, both use a single CR2 battery, and both will lock on a flag under 500 yards. Accuracy is close enough that neither is going to embarrass you on a par-3. These are legitimate mid-range rangefinders — the differences are real but not dramatic.

Where They Differ

Display and Readability

This is the biggest real-world gap. The Blue Tees runs an OLED display with manual brightness control. The Nikon uses a standard internal LCD-style display. OLED reads darker, reads brighter, and has more contrast in tricky light — the kind of contrast that actually helps when you're shielding the lens from afternoon sun. Nobody reads a rangefinder in direct sunlight; they read it in the shadow of their palm, and an OLED makes that easier. The Nikon's display is functional and clear enough for most conditions, but if display quality matters to you, Blue Tees has the edge here and it's not subtle.

Accuracy and Optics

The Nikon is rated at ±0.75 yards. The Blue Tees is rated at ±1 yard. That's a real difference on paper, even if it's hard to feel in practice on a 165-yard approach shot. What's not speculative is that Nikon makes lenses for a living — cameras, binoculars, scopes — and that heritage shows up in their rangefinder glass. The COOLSHOT 40i GII also has a longer flag lock range (500 yards vs. 350 yards on the Blue Tees), which matters if you're playing long courses or regularly shooting par-5 flags from 450 out. Probably most golfers never flag-lock past 300, but if you do, the Nikon has the reach.

Battery and Build

Both run on CR2 lithium batteries — the Nikon on one, the Blue Tees on three. CR2s are widely available and cheap, which is good news either way, but three batteries means the Blue Tees has more runtime between swaps. The tradeoff is weight and size: we don't have published dimensions or weight for the Blue Tees, but three CR2s add bulk. The Nikon weighs 5.6 oz and has published compact dimensions — it's genuinely pocketable. Blue Tees calls out the "ultra-magstrip" for cart attachment, which is a nice grab-and-go feature; the Nikon doesn't list a magnet. If you live and die by the cart-mount, that's a real lifestyle difference.

Warranty and Brand Backing

The Nikon ships with a five-year warranty. Blue Tees doesn't publish one in these specs. That gap matters if you're thinking long-term — five years is a meaningful commitment from a brand, and it offsets some of the price difference. Seems like Nikon is leaning on that warranty to signal confidence in a product that costs less. Take that for what it's worth.

Who Should Buy Which

Get the Blue Tees Series 4 Ultra if:

• You play early mornings or late afternoon rounds where light changes fast and an OLED display earns its keep
• You keep your rangefinder on the cart and want the magnetic strip to actually hold it there between shots
• You've tried LCD rangefinders and found yourself squinting — the OLED brightness control is a genuine upgrade
• You're the golfer who upgrades gear every few years and wants the premium feel in hand, not just on spec sheets

Get the Nikon COOLSHOT 40i GII if:

• You're the 12-handicap who wants something accurate, reliable, and backed by a five-year warranty — and doesn't want to think about it again
• You play long, open courses where flag-lock distances past 400 yards actually come up
• You want the most accurate number in this price range (±0.75 yards is the better spec)
• You carry your bag and want the lightest, most compact option in your pouch without sacrificing optics quality

The Bottom Line

Honest answer: the Nikon outperforms its price. You get better stated accuracy, longer flag-lock range, a five-year warranty, and Nikon's optics reputation for $49 less. The Blue Tees punches back with a genuinely better display and the magnetic strip, which some golfers use constantly and others never think about. If those two features — OLED and magnet — are part of how you actually play, the $49 premium is easy to justify. If they're not, the Nikon is the smarter buy at the lower price.

Get the Nikon COOLSHOT 40i GII.

See Also

• Blue Tees Captain Pro vs Nikon COOLSHOT 40i GII
• Blue Tees Series 4 Ultra vs Leupold GX-5c
• Blue Tees Series 4 Ultra vs Shot Scope PRO X
• Blue Tees Captain Air vs Blue Tees Series 4 Ultra
• Blue Tees Series 4 Ultra vs TecTecTec ULT-X