Gold-plated plastic socket, reliable contact, super transmission performance, signal stability increased by 40%. High-quality DB9 solderless RS232 D-SUB serial to 9-pin male terminal port and adapter connection board. All signal ports are clearly named and labeled on both sides of the board for easy wiring. It can connect all types of serial devices. Such as computer and tax control machine, digital camera, PLC, PDA, MODEM, set-top box, barcode machine, industrial instrumentation and other communication equipment. Suitable for a variety of pin connections required to use serial communication industrial control products. size: 48 x 34 x 20 mm Material: engineering plastic + metal color: black Package contents: 1 * DB9 solderless female connectors 1 * DB9 solderless male connectors Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.