The difference in price with the suunto d4i novo is very small. is it worth buying the d4f?

Buy the D4i unless you only ever plan on freediving. I pretty much never put on scuba anymore. They are exactly the same except D4f doesn't have scuba mode. They have the same depth rating etc. Also, if you change your own battery you void the warranty. I've done mine 3x with no issues but change and grease the o ring and be careful.

does the d4 do nitrox?

The product shown is the D4F which is freediving only and does not do scuba functions. The D4I does freediving and all the scuba functions including nitrox.

Is the band replaceable? If so, how much do the replacements cost?

Good afternoon The D4 straps are replaceable and cost $62.95 for the new strap. If you ever want a replacement strap contact us and we will place an advert on the Amazon site for the item. Thank you for the inquiry Kevin L Houseofscuba

Is there a way to put the watch into sleep mode?

Hello Gerhardi A.J. Thanks for your question, I wasn't able to find any information about a "sleep mode" specifically. However, you are able to take the computer out of dive mode. At which point it will simply display the time and date. Please let me know if I can help in any other way. Zach House of Scuba

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Suunto D4F Black Freedive Computer

Product ID: 42782276

Details

Brand
SUUNTO
Item Weight
86 g
Item dimensions L x W x H
5 x 3.6 x 3.5
Material
Stainless
Number of Items
1

🌊100m max depth tracking

⏱️Apnea timer for breath control

⚖️Lightweight 86g design

Description

🌊 Dive smarter, breathe better, and own the underwater moment.

COMFORT THAT LASTS - Soft elastomer strap ensures a secure, comfortable fit from surface to seabed.
DURABLE MEETS STYLISH - Robust stainless steel bezel and mineral crystal glass combine toughness with sleek everyday wearability.
EFFORTLESS DIVE LOGGING - Review detailed dive logs post-dive to analyze and improve your underwater adventures.
DIVE DEEP WITH CONFIDENCE - Tracks current and max depth up to 100 meters, so you never miss a milestone.
MASTER YOUR BREATH MASTER THE DEPTHS - Integrated apnea timer sharpens your freediving technique for longer, safer dives.

The Suunto D4F Black Freedive Computer is a lightweight, durable dive companion designed for freediving, snorkeling, and spearfishing. Featuring an apnea timer, 100m depth tracking, and detailed dive logging, it empowers underwater enthusiasts to optimize performance and safety. Its stainless steel bezel and mineral crystal glass ensure resilience, while the comfortable elastomer strap makes it perfect for daily wear both in and out of the water.

Specifications

ASIN	B06XKVLDQ3
Best Sellers Rank	#728,484 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #71 in Digital Diving Gauges
Brand Name	SUUNTO
Customer Reviews	4.8 4.8 out of 5 stars (42)
Item Dimensions	5 x 3.6 x 3.5 inches
Item Weight	86 g
Manufacturer	Suunto
Material Type	Stainless Steel
Model	SS023198000
Part Number	SS023198000
UPC	045235913756
Unit Count	1 Count
Warranty Description	This product comes with a full manufacturer warranty.

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