Excellent Anti-interference-DSSS & FHSS communication technology and 7dBi high gain antenna make AT10II transmitter with stable transmission signal and the control range is up to 2.5 miles(4km) in the air. Real-time Information-Airplane voltage monitor on AT10II screen when paired with PRM-01(package included). When AT10II equip with PRM-03(sold separately) module and flight controller crossflight APM, Pixhawk, Mini Pix, to enable telemetry information on the radio's screen like battery voltage, speed, altitude, RSSI, distance, and more.