Green-utech 6ft Usb Ttl Serial Adapter Converter Cable 3.3v/3v3 3.5mm Stereo Jack Cable Support Win 7 Win 8 Android Linux, Mac Os Etc FBA shipment, the shipment time about 2-3 days from USA FBA warehouse It is a 3.3v Level TTL signal cable with FTDI chipset (Not RS232), It is not a common headphone cable, If you don't know how to use/install it, or you don't know it uses in which device, please don't buy it . Standard pinout: TIP-TXD, RING-RXD, SLEEVE-GND, Driver download:www.ftdichip.com. Window8/10 installed by itself . If you can't find the serial port, please read the picture on left Support Android, Support Win 8, Win 7, XP, 2000, Linix, Mac OS Support Windows 8.1, Windows 8, 32bit or 64bit. 6ft usb serial ttl 3.3v 3.5mm stereo jack cable, PCBA with FTDI chipset inside of USB connector, Notice: we tested each cable before sending, so we strive 100% Positive feedback , please contact us before leave a negative feedback . we will solve your all questions. besides, For this cable , it is not a common cable, it is a 3.3v TTL level cable with FTDI, Not a RS232 cable, not a common headset cable, if you don't know how to use (or which devices), please don't buy it . thank you .