RJ11/RJ9 4P4C panel feed-through connector, suitable for developing input/output configuration of custom telephone communication systems, designed to connect securely with narrow 4P4C cables. RJ9 4P4C connector is compatible with CAT3 cable, enabling reliable signal transmission in voice and data applications when used appropriately. RJ11/RJ9 4P4C panel connector is used to extend the connection line between telephone handsets and telephone headsets. Commonly used for connecting telephony equipment in communication setups. RJ11/RJ9 4P4C panel mount connector features an installation size that fits XLR panel or D-type panel with 24mm opening. Suitable for mounting on walls, desktops, equipment panels, and racks. Connector 1: RJ9 4P4C Female Connector 2: RJ9 4P4C Female Mount Type: Panel Mount (XLR/D-Type compatible) Color: As shown Material: Plastic Due to different manufacturing batches, there may be slight variations in product appearance and labeling; these do not affect functionality. Package Contents: 1 x Panel Mount Cable Adapter (XLR/D-Type style) Note: The package includes only the item listed above. Other accessories are not included. Lighting and display settings may cause slight color differences between the image and the actual product. Measurement error allowed is +/- 1-3 cm.