The Flysky Noble NB4+ is an upgraded 8-channel, 2.4GHz AFHDS 3 protocol radio transmitter designed primarily for RC cars and boats, replacing the standard NB4 model with enhanced performance and display features.  It features a 3.5-inch high-brightness IPS touchscreen (320x480 resolution) that remains visible in direct sunlight, a race-inspired steering wheel with improved feedback, and a dual-battery system comprising a 4300mAh handle battery and a 3450mAh removable 18650 base battery, offering over 10–18 hours of endurance. 

Key capabilities include ultra-low latency 2CH Turbo mode for rapid response, i-BUS2 support for real-time sensor data (speed, temperature) and remote ESC/Gyro parameter adjustment, and a USB Type-C interface that supports both coach mode (via dual-ended cable) and head tracking functionality.  The system includes a compact receiver like the FGr4B (or FGr4S V2), which offers bidirectional data transmission, failsafe settings, and compatibility with various AFHDS 3 receivers. 

Compared to the NB4 Pro+, the standard NB4+ lacks the Pro+’s superior potentiometer precision, 1.5M i-BUS2 rate, and slightly larger build, but retains the core 3.5-inch display, USB-C coach/head-tracking features, and high-capacity batteries at a significantly lower price point.  It is widely regarded as a high-value upgrade for hobbyists seeking professional-grade features like customizable UI themes, 16-channel frequency hopping for anti-interference, and online updates.