Divevolk SeaLink Underwater Smartphone Data Transmitter

Underwater data connection using a smartphone

The DiveVolk SeaLink is a system designed to transfer mobile data from the water surface to a smartphone used underwater. The smartphone is placed inside a waterproof housing and connected by cable to a floating surface unit. This surface unit receives the mobile signal above water and passes it on to the phone below.

The system is intended for situations where live data, video or communication is required during a dive, within a maximum operating depth of approximately 30 m (98 ft).

Compatible with most smartphones

The underwater housing supplied with the SeaLink set is the DiveVolk SeaTouch Max Plus, a housing that is also widely used separately by divers and snorkellers. A wide range of smartphones can be used by fitting the appropriate adapter.

Adapters for iPhone 12 through iPhone 16 (various versions) are included with the system. If a different smartphone is used, a separate adapter is required.

Full touchscreen operation of the smartphone remains possible underwater. This allows apps and functions that normally require an internet connection to be used while submerged.

System operation

The SeaLink consists of a floating surface communication unit and an underwater housing containing the smartphone. These components are connected by a cable with a maximum length of approximately 30 m (98 ft).

Data transfer between the components takes place via 2.4 GHz Wi-Fi (2412–2484 MHz). As long as mobile coverage is available at the surface, the smartphone underwater can send and receive data.

Communication and use cases

SeaLink provides the data connection between underwater and the surface. Video calls, visual communication and text-based messaging are all possible, allowing surface teams to follow the dive and exchange information in real time.

When combined with a full-face diving mask and a communication unit (microphone and speaker, not included), spoken communication with the diver becomes possible via the smartphone connection.

The system can be used for inspection work, documentation, research, education and operational support where real-time underwater visibility is required.

Important usage conditions

• Mobile network coverage at the surface is required.
• The diver remains physically connected to the surface unit by cable.
• Maximum specified operating depth is approximately 30 m (98 ft).
• The phone screen protector must be removed before use.
• Technical specifications
• Wi-Fi frequency: 2.4 GHz (2412–2484 MHz)
• Maximum cable length: approximately 30 m (98 ft)
• Cable load rating: approximately 5 kg (11 lb)
• Battery life (specified): approximately 60 hours
• Operating temperature: -10 to 50 °C (14 to 122 °F)
• Total system weight (specified): approximately 9.5 kg (21 lb)
• Transport case dimensions: 590 × 390 × 160 mm
• Surface unit buoyancy: +3750 g (seawater), +3550 g (freshwater)
• Underwater terminal buoyancy: -360 g (seawater), -400 g (freshwater)
• Package contents

According to the available product information, the SeaLink package includes the following main components:

• Floating surface communication unit
• Underwater terminal (housing with iPhone 12–16 adapter)
• Connection cable
• Foldable inflatable float
• Safety antenna enclosure with marking
• Transport case with wheels
• Versions and regional compatibility
• The DiveVolk SeaLink is available in different regional versions, including Europe–Australia, United States, Japan and Asia. The system is designed to work with multiple mobile carriers depending on the selected version.

As standard, the European version is supplied. If a different regional version is required, please contact us.