RMILEC NB20 V2 (4047NB20) is a next-generation UHF Long Range System designed for professional RC pilots, UAV manufacturers and system integrators. Instead of being just another “long-range module”, it acts as a dedicated command backbone that coexists with HD video links and autopilot systems. With up to 5W RF output, high receiver sensitivity and intelligent control logic, NB20 V2 delivers a predictable, debuggable and repeatable control link in environments where conventional 2.4GHz systems quickly reach their limits. RMILEC NB20 V2（4047NB20）是一款专为专业 RC 玩家、无人机整机厂与系统集成商打造的下一代 UHF 长距离遥控系统。 它不仅是一块“远程 RF 模块”，而是作为独立的控制骨干，与高清图传与自动驾驶系统并行工作。 通过最高 5W 射频输出、超高接收灵敏度与智能控制逻辑，NB20 V2 能在传统 2.4GHz 系统逐渐吃力的环境中， 仍然提供可调试、可预判、可复现的高可靠控制链路。
Compared with the previous NB20 (V1), NB20 V2 adds a programmable frequency band, richer telemetry on the display, flexible RF power control and improved thermal management — giving you a more capable and safer long range link. 相比上一代 NB20（V1），NB20 V2 新增可编程频段、更丰富的屏显遥测、更加灵活的射频功率控制以及升级的热管理设计， 为长距离任务提供更强大、更安全的控制链路。
Operates in 400–470MHz with fixed presets at 433/435/445/455MHz. Programmable channels help you avoid interference and comply with local regulations. 工作于 400–470MHz 频段，内置 433 / 435 / 445 / 455MHz 预设通道，并支持自定义信道，方便规避干扰、匹配本地法规。
Choose between 0.5W, 1W, 2W or 5W RF output to balance link margin and power consumption. RF power can be adjusted from the radio and touch screen. 提供 0.5W / 1W / 2W / 5W 多档可选输出功率，可根据任务距离与电源条件灵活调整，并支持通过遥控与触控界面进行设定。
Receiver sensitivity reaches approximately -115dBm. Combined with narrow-band filtering, NB20 V2 delivers robust performance in crowded RF environments. 接收灵敏度约 -115dBm，结合窄带滤波与抗阻塞设计，即使在复杂电磁环境中也能保持稳定控制链路。
Supports 2 PPM and 1 SBUS inputs. With proper conversion, PWM systems are also supported — ideal for dual-operator setups. 支持 2 路 PPM 与 1 路 SBUS 输入，可通过适配器接入 PWM 系统，满足单人/双人协同控制等多种应用需求。
The built-in display shows system status, servo output data and input signal analysis, making setup and troubleshooting much easier. 内置显示屏可实时查看系统状态、舵机输出数据与输入信号分析，使调试过程更加直观、可视和可控。
An upgraded cooling fan and heat management keep the system stable at high RF output levels, suitable for long-duration industrial missions. 升级风扇与自动散热逻辑，保证在高功率输出下仍能长期稳定运行，非常适合长时间巡检与工业级任务。
RMILEC focuses on one thing: building robust, long-range control links for serious RC and UAV users. The NB20 series is trusted by integrators and pilots who treat the control link as a critical part of the system. RMILEC 一直专注于一件事：为严肃玩家与行业用户提供稳定可靠的长距离控制链路。 NB20 系列已成为众多无人机厂商与飞行员在关键任务中信赖的控制系统。
Born from real field experience, RMILEC products are designed together with pilots, system integrators and industrial users who rely on their link for every mission. 源自大量实飞与工程集成经验，RMILEC 与飞行员、整机厂与行业用户共同打磨产品，将“可用性”与“稳定性”放在首位。
In many industrial UAV projects, video and data links are upgraded first, while the control link is often overlooked. RMILEC fills this gap by providing a dedicated UHF control backbone that can coexist with HD video systems. 在许多工业无人机项目中，视频链路往往升级得很快，而控制链路却容易被忽视。 RMILEC 的定位就是为整机提供一条独立、稳定的 UHF 控制“骨干”，与现有高清图传系统协同工作。
Whether you are flying a long-range mapping fixed-wing, a heavy-lift multirotor or a customised VTOL, RMILEC NB20 V2 gives you a clear, configurable and predictable control layer. 无论是长航时测绘固定翼、重载多旋翼还是定制化 VTOL，RMILEC NB20 V2 都能提供一层清晰、可配置、可预判的控制基础， 让飞行平台专注于执行任务本身。
Explore detailed views of the RMILEC NB20 V2. Below are high-resolution images showcasing the design, components and build quality of the system. 欢迎查看 RMILEC NB20 V2 的外观与细节展示。以下为展示系统设计、组件与工艺的高清产品图片。
The NB20 V2 builds on the classic 4047NB20 platform with a wider frequency range, more flexible RF power settings and enhanced display functions. 基于经典 4047NB20 平台，NB20 V2 通过扩展频段范围、增加可调功率档位与完善屏显功能，使整套系统更易用、更强大。
| RMILEC NB20 V2 (4047NB20) – Main Specifications RMILEC NB20 V2（4047NB20）——主要技术参数 | |
|---|---|
| Frequency Band 工作频段 | 400–470MHz programmable, presets at 433 / 435 / 445 / 455MHz 400–470MHz 可编程，预设 433 / 435 / 445 / 455MHz |
| RF Output Power 射频输出功率 | 0.5W / 1W / 2W / 5W |
| Receiver Sensitivity 接收灵敏度 | Approx. -115dBm |
| Input Interfaces 输入接口 | 2 × PPM, 1 × SBUS (PWM via external converter) |
| Display & Telemetry 显示与遥测 | System status, output servo data, input signal analysis 系统状态显示、舵机输出数据、输入信号分析 |
| RF Power Control 功率控制 | Remote RF power control + touch screen configuration 支持遥控调节与屏幕触控设置 |
| Cooling 散热设计 | Automatic heat dissipation with improved cooling fan 升级散热风扇与自动散热逻辑 |
| Antenna 标配天线 | Diamond SRH771 |
| Typical Application 典型应用 | Long-range RC, industrial UAVs, FPV, special unmanned systems 长距离 RC 控制、工业无人机、FPV 长距飞行与特种无人系统 |
| NB20 (V1) vs NB20 V2 – Key Improvements NB20（V1）与 NB20 V2 —— 关键差异 | ||
|---|---|---|
| Feature 项目 | NB20 (V1) | NB20 V2 |
| Inputs 输入接口 | 1 × PPM, 20 × PWM, 1 × SBUS | 2 × PPM, 1 × SBUS |
| RF Output Power 输出功率档位 | 2W, 5W | 0.5W, 1W, 2W, 5W |
| Frequency 频段支持 | 433 / 435 / 445 / 455MHz | 433 / 435 / 445 / 455MHz + 400–470MHz programmable |
| Display 显示功能 | None 无 | System status, servo data, signal analysis 系统状态、信号与舵机数据可视化 |
| RF Power Setting 功率设置方式 | DIP switch | Remote control + touch screen 遥控 + 触屏可调 |
| Cooling 散热结构 | Standard cooling | Upgraded fan & automatic thermal logic 升级风扇 + 自动散热策略 |
NB20 V2 is suitable for any scenario where you need a robust, long-range command and control link on the UHF band. 凡是需要在 UHF 频段上实现稳定、可控、长距离遥控链路的场景，NB20 V2 都能成为可靠的核心组件。
Ideal for FPV fixed-wing aircraft, long-range multirotor drones and hybrid VTOL systems that require a reliable control link beyond visual line of sight. 适用于长航时测绘固定翼、长距巡检多旋翼、复合翼 VTOL 等超视距任务平台（在当地法规允许范围内）。
For industrial inspection, mapping, agriculture and surveillance UAVs that demand a robust command link separated from video transmission systems. 适用于电力巡检、石油管线、光伏电站、风场、农业植保与安防巡逻等需要可靠控制链路的工业平台。
Suitable for robotics platforms, unmanned ground vehicles, unmanned boats and research projects requiring deterministic remote control. 适用于无人车、无人船、无人艇、特种机器人以及高校与科研机构的实验项目。
We are building a focused network of partners who understand long-range RC and industrial UAV projects. RMILEC 正在全球范围内构建一支专注长距离 RC 与工业无人机项目的小而精合作伙伴网络。
As a distributor or integration partner, you can offer a proven UHF control link that complements HD video and autopilot systems. 作为代理商或集成商，您可以向客户提供一条与高清图传、自动驾驶系统相互补充的成熟 UHF 控制链路。
We are particularly interested in UAV manufacturers, solution providers and professional RC/FPV shops. 我们特别欢迎无人机整机厂、行业解决方案商以及面向长距飞行用户的专业 RC/FPV 渠道。
Send an e-mail to sales@rmilec.com with the subject “RMILEC Distributor Application” or contact us via WhatsApp. 您可以发送邮件至 sales@rmilec.com（邮件标题建议为 “RMILEC Distributor Application”）， 或通过 WhatsApp 与我们联系。
Please include: 建议在申请信息中包含：
We will get back to you with our latest dealer price list and cooperation details. 收到信息后，我们将尽快回复最新的代理价格与合作细节。
Tell us about your platform and requirements, and our team will help you configure the right RMILEC NB20 V2 solution. 请告诉我们您的平台类型与任务需求，我们将为您推荐匹配的 RMILEC NB20 V2 配置方案。
RMILEC
E-mail: sales@rmilec.com
Tel / WhatsApp:
+86 189 5017 0265
For faster assistance, please share essential project details such as:
• Aircraft/UAV platform type
• Control distance requirement
• Flight environment (urban, open field, high-interference, etc.)
• Applicable radio-frequency regulations in your region
Providing this information allows us to recommend the most suitable configuration and RF settings for your mission.
为便于我们更快速、准确地为您提供支持，建议您提供以下项目信息：
• 航空器 / 无人机平台类型
• 所需控制距离
• 使用环境（城市、高干扰区域、空旷场地等）
• 您所在地区适用的无线电频率法规
提供以上信息将有助于我们为您的任务推荐最合适的配置方案及最佳RF设置。
