TOP CHOICE! Plug and play, solid construction. Most simulators, TBS Crossfire Protocol (915 Module), and trainer mode support are all supported by the three-in-one multi-function port. When you are in a loud environment, DD uses noises, vibrations, and phrases alarmingly shown on the LCD screen to remind you. The AT9S Pro transmitter has a steady broadcast signal and extended range control up to 2.1 miles thanks to DSSS&FHSS communication technology. Technical Features: 1. 10/12 channels, 3ms Fast Response 2. Dual-Rate and Programmable Mix Control 3. Multiple Model Options PROS Long range Suitable for drones and airplanes CONS Not for beginners