Plantronics Quick Disconnect (QD) Y-Adapter Trainer Cable, model 27019-01. The Y-adapter is a headset accessory featuring Quick Disconnect (QD) connectors, allowing a second headset or supervisor/trainer to listen without interrupting the main user. Designed for use with headphones and base units compatible with QD from Plantronics. It has a durable cable with insulation and a black finish. Part Number/MPN: 27019-01. EAN: 017229115262. Typical cable length approximately 30 cm. Product weight approximately 30 g. Ideal for call centers, training, and monitoring applications.