Aqualung i300C Bluetooth dive computer
The i300C combines a backlit display with four operating modes and Bluetooth connectivity. Two buttons provide access to settings, logs and dive information, while the user-changeable battery supports routine maintenance.
- Air, Nitrox, Gauge and Freediving modes.
- Switching between up to three gases.
- Audible alarms and visible warning light.
- Water or button activation.
- Salt- or freshwater selection.
- Dive log, history and planning functions.
- Settings and calculations retained during battery changes.
The listed package includes a lens protector, battery-compartment tool and product guides. Follow the i300C manual for gas configuration and battery replacement. Check the current supported app and software requirements.
More About This Model
Bluetooth technology is now added to the popular i300, making it even simpler to use
The i300C’s uncomplicated, intuitive, and rugged design lets you focus on your dive, not your gear. With an easy-to-use interface, flexible operating modes, built-in backlight and water-activated on switch, the i300C gets you in the water and descending to your next adventure in no time. This durable, versatile and affordable dive computer is great for new divers as well as dive schools and centers. Users will appreciate the data retention feature that saves past settings and calculations between battery changes.
Wirelessly manage your dive data and settings on your mobile device via the computer’s Bluetooth connectivity and after your dive share your memories, stats, photos, and dive site on social media all through the free DiverLog+ app.
User-Changeable Battery Uses globally available standard batteries found at supermarkets and drugstores so you can easily replace as needed.
Intuitive Navigation Single-button access to last dive data (depth and bottom time)
Increased Safety Audible alarms and additional high-visibility LED warning light
History Mode History Mode lets you see your total dives, depth, total dive hours, and lowest temperature. Records up to 24 dives
Deep Stop Optional deep stop with countdown timer
How the Features Help
- Low-light viewing: The backlight helps you read the screen in dim conditions. Familiarise yourself with its activation and timeout so you can use it without searching through menus during the dive.
- Controls: The listed button layout provides access to settings and alternative views. Practise navigation with your normal gloves and exposure equipment before diving.
- Keeping your dive record: The supported connection transfers dive logs for post-dive review and, where supported, software updates. Optional external interfaces remain separate accessories unless included in this package.
- Replaceable battery: The stated user-replaceable battery can be changed using the model’s prescribed procedure. Battery type, seals, tools and data-retention steps are specific to that computer.
- Freediving records: The applicable freediving mode records breath-hold dive and surface information separately from scuba operation. Configure prompts for your training plan and follow the manual’s restrictions on changing between modes.
- Lens Protector
Choosing and Setting Up This Model
Compare the modes, gas capability, display and mounting arrangement with the diving you are trained to do. Check exactly what this listing includes, particularly transmitters, interfaces and charging accessories. Configure the computer using its own manual and confirm gases, alerts, units and battery status before diving. A depth rating describes an instrument limit and does not establish a suitable dive depth.
Gear Care and Maintenance
After every dive, rinse gently in fresh water to remove salt, chlorine and grit. Let residue soften by soaking only as the model’s manual permits, and operate buttons during rinsing only where instructed. Do not direct a high-pressure hose or compressed air at sensor openings, and never probe them with a tool.
Use a soft cloth on the housing and screen. Use only the cleaning product and method approved in this model’s manual; avoid solvents, abrasives, bleach and strong detergents. Let the instrument and strap air dry fully in the shade before packing or charging.
Inspect the strap, attachment points, display and seals before use. Store in a cool, dry place away from direct sunlight, heaters and hot cars, with the screen protected from loose equipment. Follow the manufacturer’s battery-storage and servicing instructions.
Change batteries only using the specified cell, correct replacement seals and the manual’s procedure. Work on a clean, dry instrument, inspect sealing surfaces and follow any required pressure or leak test before diving. A compatible battery kit does not authorise opening a model that is not user-serviceable.

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