Choosing dive computers & instruments comes down to a practical split: do you need wireless tank pressure and a compass, a particular wrist computer, or the lowest listed price? The four choices differ in condition, configuration, and included equipment, so the most expensive model is not automatically the right fit.
Start with the dive functions and form factor you actually want. Then use condition and listed price to break ties. A used Shearwater Perdix, a used Shearwater Teric, a used Suunto EON Core, and the New Open Box Aqua Lung i330R each point to a different buying priority.
Quick take
The fastest way to narrow the field is to identify whether wireless tank information, a specific Shearwater model, a defined case size, or New condition matters most. The price table sets the financial boundary; the decision matrix and product notes explain what each choice gives up.
Listed-price comparison
| Computer | Listed price | Price bar |
|---|---|---|
| Shearwater Perdix | $500.00 | |
| Shearwater Teric | $624.99 | |
| Suunto EON Core | $450.00 | |
| Aqua Lung i330R | $279.00 |
The difference between the lowest and highest listed prices is $345.99. That spread is large enough to make configuration and condition important parts of the decision, not afterthoughts.
Decision matrix
- Wireless tank-pressure and orientation setup: Suunto EON Core. Wireless tank pressure and a digital compass directly match this use case.
- Original Perdix wrist computer: Shearwater Perdix. Choose it when the original model and wrist format are the target; its non-air-integrated setup is a defining distinction.
- Teric-specific configuration: Shearwater Teric. Its multi-gas decompression listing and defined 55mm case size matter when those exact attributes are wanted.
- Price-first route: Aqua Lung i330R. New Open Box condition and the i330R model make it the straightforward starting point for shoppers prioritizing the lowest listed price.
Product notes
Shearwater Perdix Wrist Dive Computer
An original Perdix wrist computer is the defining reason to choose it. Its 54-dive history gives the unit a specific use history, and blue bungees are offered for creating straps. The limitations are visible and practical: it is used, the housing has scratches, the screen protector is scratched, and the buckles have only one arm on the male end. There is no box, and the computer is the main included item. Choose it when that original model and wrist format are the priority; pass when cosmetic wear or a ready-to-use buckle arrangement would create friction.
Shearwater Teric Dive Computer
The Teric suits shoppers who want a named 55mm case size and multi-gas decompression in one computer. The package includes a genuine charger, case, documents, carabiner, and M/L band, giving the purchase a clearly defined accessory set. Its limitation is used condition and the highest listed price in this comparison. A silicone band is specified, but the model remains a poor fit for a price-first search. Choose the Teric when the 55mm format and multi-gas listing are the reason for buying, rather than when the goal is simply to minimize the upfront price.
Suunto EON Core Wrist Dive Computer
The Suunto EON Core combines wireless tank pressure, a color display with large digits, a rechargeable battery, wireless mobile connection, and customizable settings. Its transmitter-and-USB configuration adds a concrete reason to choose it for a setup built around wireless tank information. At $450, its trade-off is used condition, and shoppers focused on a Shearwater model may prefer a different fit. The combination of readable display features and rechargeable power gives the EON Core a clear role. Choose it when the included transmitter and wireless tank pressure are central to the purchase.
Aqua Lung i330R Dive Computer
Aqua Lung i330R is the clearest price-first choice: at $279, it is the lowest-priced computer in the comparison and is marked New Open Box. It was powered on only to verify function and was never used in water, giving it a specific appeal for shoppers prioritizing New condition at the bottom of the listed price range. The limitation is the open-box status itself; the package has been opened, so it will not suit someone who wants an unopened box. Choose the i330R when price and condition lead the decision.
Final recommendation by use case
For wireless tank pressure and a transmitter, choose the Suunto EON Core. For the original wrist computer and tolerance for visible wear, choose the Shearwater Perdix. For the Shearwater Teric model and its stated configuration, choose Teric; its $624.99 price is the high end here. For the lowest listed price and New Open Box condition, choose the Aqua Lung i330R. In short, start with the required configuration, decide how much used condition you can accept, and only then compare the listed prices.
