Celestron Nexstar Hand Control USB RS232 Serial to RJ9 4P4C Update Firmware Cable for Celestron Nextstar Hand Control

Please note this listing is a RS232 cable, NOT TTL cable.
The Celestron USB RS-232 Cable is used to connec your PC or computer to NexStar computerized telescopes via a port in the hand control.
Attaches to the computer's USB port and the telescope's hand control via a phone jack plug.
The Celestron Nexstar USB RS-232 cable is also necessary for flash upgrades to hand control software.

Cable: 3C*28AWG black PVC jacket
Length: 100cm, 180cm, 300cm optional, other Length can be customized
RS232 signal level
Original Prolific PL2303GT chipset
GND, TXD, RXD optional
PC COM RS232 standard signals, not TTL
Pinout Wiring: 1-RXD, 2-GND, 4-TXD
TX is match with RX of device, RX is match with TX of device
Support Win XP/9X, Win 7, Linux, CE, etc