Relay Station Repeater TX/RX-D Time Delay Connector Cable for Motorola Features: 1. This is TX/RX-D time delay cable for Motorola two-way radio relay station repeater. 2. wire with tensile resistance, bending resistance and quality assurance. 3. Exquisite workmanship: the circuit board is precise and durable. 4. Two-way control, easy to install. 5. Suitable for Motorola GR300, GR3188, GM300, GM3688 and other two-way radios. Installation Method: 1. When used on M120, M208, GM300, GM3188 and GM3688, the RX plug is inserted into the receiver with the RX character facing down. The TX plug is inserted into the transmitter with the TX character facing down. After aligning the foot, insert it to the end. The TX/RX-D plug is mounted on the link with the TX/RX-D character facing down. 2. When used on the SM50, SM120, and M1225 machines, the RX plug is inserted into the receiver with the RX-D character facing up. The TX-D plug board is inserted into the transmitter with the TX-D character facing up. Align the pin to the end. The TX/RX-2 plug is mounted on the link with the TX/RX-2 character facing down. 3. In some walkie-talkies (M208.GM300.SM50.SM120, GM950I, etc.), if there is a phenomenon that the repeater does not forward, must first determine if the pin definition of the external expansion port (16-pin socket) behind the walkie-talkie has been changed before. The 3 pin must be set to PTT active low, and the 8 pin set to BUSY output active low. Then you can use the relay function normally. Specifications: Material: PCB Cable Length: 31cm / 12.2in Plug: Double row 16 hole Weight: Approx. 16g Packing List: 1 * Relay Station Cable