Serial data transmission, up to 921.6 Kbps DB9 female to terminal block adapter for easy wiring LEDs to display USB and TxD/RxD status USB interface Interface speed: 12 Mbps USB interface: USB Type A USB standard: USB 2.0, compatible with USB 1.0/1.1 Number of ports: 1 Serial port standard: -232 Transmission interface: DB9 male connector Baud rate: 50 bps to 921.6 kbps Data bits: 5, 6, 7, 8 Stop bits: 1, 1.5, 2 Parity bits: None, Even, Odd, Space, Mark Flow control: None, /, XON/XOFF -232: TxD, RxD, , , DTR, , DCD, GND Operating temperature: 0 to 55℃ (32 to 131°F) Storage temperature: -20 to 70℃(-4 to 158°F) Relative humidity: 5 to 95% (non-condensing) (The product appearance and printed words depending on the batch, but this does not affect use) Color:As Shown Material:plastic Package Contents: 1 * USB to 232 serial hub Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.