Certificates
Compliance certificates	RoHS
Features
Cable length	0 m
Connector 1	3.5mm TRS
Connector 1 gender	Male
Connector 2	2 x MiniJack
Connector 2 gender	Female
Connector 1 form factor	Straight
Connector 2 form factor	Straight
Product colour	White
Logistics data
Harmonized System (HS) code	85189000
Packaging data
Package width	80 mm
Package depth	20 mm
Package height	113 mm
Package weight	27 g
Package type	Blister
Weight & dimensions
Weight	5 g

The Sandberg Headset converter Dual->Single (manufacturer number 508-59) is an adapter for connecting classic headsets with two separate MiniJack plug connectors to devices that feature a single combined MiniJack connector. This adapter ensures compatibility between older headsets, each having a separate plug for microphone input and audio output, and modern end devices such as laptops or mobile phones, which use a single 3.5mm TRS connector for both functions. The connection is made via a straight plug at one end and a straight socket at the other, with a cable length of 0 m, meaning it is a direct plug connector without cable. The product is finished in White and weighs 5 g.

Applications
This adapter is specifically designed for use with end devices that feature a combined MiniJack connector (also known as a TRS connector) for audio output and microphone input. This is common in many modern laptops, smartphones, and tablets. The application is primarily in office and home environments, where a clear separation of audio and microphone signals is desired.

Functions and Equipment in Detail
The adapter connects two separate 3.5mm TRS connectors — one plug and one socket — in a compact, straight design. The socket accepts the plug of a conventional headset, while the plug is inserted into the combined MiniJack connector of the end device. The 3.5mm TRS technology enables the transmission of two signals (audio and microphone) over a single cable, with electrical separation achieved through the different contacts in the plug. The device is designed for simple, quick, and stable connection, without requiring additional power supply or software configuration.

Technology Explained Simply
The adapter operates purely passively, without electronic components or power supply. It serves only as a mechanical and electrical connection between two different plug systems. The TRS designation (Tip, Ring, Sleeve) describes the three contacts in the plug, each responsible for a different signal: Tip for the microphone, Ring for the audio output, and Sleeve as ground. The adapter ensures that the signals are correctly routed to the corresponding contacts in the combined plug. The straight shape of the connectors facilitates easy insertion into tight connector openings, especially on laptops and mobile phones.

Compatibility and Accessories
The adapter is compatible with all devices that feature a 3.5mm TRS MiniJack connector for combined audio and microphone signals. It enables the use of headsets with two separate MiniJack plugs on these devices. The connection is purely mechanical, requiring no additional software or drivers.

Installation and Mounting
Installation is done by simply inserting the adapter into the MiniJack connector of the end device. Then, the headset plug is inserted into the socket of the adapter. The connection is immediately functional, without requiring additional settings or tools. The straight shape of the connectors ensures secure and smooth insertion.

Operational Advantages
The adapter provides a reliable and compact solution for using conventional headsets with modern devices featuring a combined MiniJack connector. It avoids the need to purchase a new headset with an integrated combo plug. The passive technology ensures stable signal transmission without delay or quality loss. The low weight of 5 g and compact design make it easy to carry and convenient for everyday use.