Mares Quad Ci Computer

# Mares Quad Ci Dive Computer**

The Mares Quad Ci is the flagship air-integrated wrist dive computer in the Quad lineup, marrying a familiar display format with cutting-edge capabilities. Designed for recreational and advanced divers alike, it offers tank pressure integration via Bluetooth (up to five transmitters), full nitrox support, and a large, segmented display that's clear even in poor visibility. Its biggest shift is the switch to a rechargeable lithium battery and Bluetooth connectivity—finally ditching cables and coin-cell replacements. It's an intuitive device for divers who value simplicity without sacrificing the essentials, though it still falls short on some modern premium features like a colour screen or trimix compatibility.

## **Key Features

* Hoseless air integration with up to 5 Mares LED tank transmitters * Rechargeable lithium battery (USB-C charging) * Bluetooth connectivity for log download and firmware updates * Four dive modes: Air, Nitrox, Gauge, Bottom Timer * Three customisable gas mixes (up to 99% O₂) * Large segmented LCD display with four-button control * Mares Gas Switching and Decompression Algorithm (RGBM) * Visual tank pressure colour coding with transmitter * Dive planner and logbook functions * Firmware upgradable via app

## The Good

* Large and legible screen with a no-nonsense layout * Rechargeable—no more swapping coin batteries mid-trip * Tank pressure colour coding is practical underwater * Easy to use, even with thick gloves * Bluetooth syncing is hassle-free * Gas switching is intuitive and fast * Transmitter pairing is stable and reliable * Outstanding value for a mid-to-high range dive computer

## The Bad

* No colour display or compass, which many competitors offer at this price * Bulky—definitely not a daily-wear device * No trimix or CCR support, limiting tech-diving use * App interface (Mares Dive Organizer) still feels outdated * Transmitter sold separately, and it's not cheap

## Verdict**

The Mares Quad Ci is a solid, well-priced air-integrated dive computer that will satisfy most recreational and advanced divers. It delivers all the core features you'd expect—tank pressure tracking, gas switching, nitrox support—and wraps them in a legible, user-friendly package. While it doesn't quite push into tech-diving territory, it comfortably covers liveaboard and multi-gas recreational profiles. Its standout strengths are simplicity, battery life, and that big, readable screen. But it lags in the aesthetics and feature race, with no compass, smartwatch functionality, or colour screen. For divers who don't care about bells and whistles, but want reliability, easy Bluetooth syncing, and clear dive info, the Quad Ci is a great pick. It's not revolutionary, but it's a very smart evolution of a well-loved format. If Mares updated the UI and added a compass, it would be a real contender for best in class.