Worry-free Support 12-month warranty, lifetime friendly customer service by team. Option 1. The tutorial link is printed on the guiding card inside the package. Option 2. search wit-motion(dot)com and download the complete tutorial. Option 3. contact us if you need any help, support (at) wit-motion (dot) com What You Get 1x 6-in-1 serial adapter + 4x Dupont cables + 1x Welcome card, well-packed by an antistatic bag Superior CompatibilityUSB specification 2.0 is compatible with Windows XP/7/8/10 32bits/ 64bits, Linux, Wince, Mac, Vista, etc. Robust Design Equipped with superior-quality mode switch(endurable), a status indicating LED(easy to connect), upgraded TO5 fuse (excellent protection), imported chipset CP2102 (stable and reliable), Baud rates: 300 bps to 1.5 Mbps. Multi-functional6-in-1 Multifunctional Serial adapter supports USB-TTL, USB-RS232, USB-RS485, TTL-232, TTL-485, 232-485 converting function, freely convert to each other