The improvements of H4M:
Single power on/off switch.
When powered off, the battey will no longer phantom drain, i.e., the device can be completely powered off.
Advanced battery management IC and battery display (battery %, voltage, current/draw, etc...). It is easier to check the battery level.
Matte screen. This matte screen can help you see the content of the screen much more clearly in sunny places outside.
360-degree Knob Button. The knob button becomes to be the flat design, going back to the ipod style click wheel. The knob is more convenient to use.c
The GPIO port! This new generation H4M adds a GPIO port so users can make their own add-ons for the H4M, just like the flipper zero. This is a big step forward, and it's a design that hasn't been in any previous version of Portapack.
Improved charge speeds. The H4M improves the charging quality and speed.
Built in microphone and switch toggle. And there is a toggle to switch between the Built-in and the Headphone Microphone.
Automatic switching of sound between the headphone and the speakers. Once you plug the headphone, the H4M will automatically switches from speaker mode to headset mode. This is also a feature that the previous Portapack did not have.
If you are unable to place an order on this website (for example, if your country is not within the shipping range), you can place an order in our AliExpress store. The product link for AliExpress is:
https://www.aliexpress.com/item/3256808467922261.html?gatewayAdapt=4itemAdapt
https://www.aliexpress.com/item/3256808467465341.html?gatewayAdapt=4itemAdapt
Full Support for HackRF One & Portapack
Ensures plug-and-play operation with your hackrf sdr system — no need for extra adapters or setup.
High-Performance SDR Receiver
Delivers precise and fast signal capture across a wideband range, ideal for sdr radio and frequency analysis.
Compact Design for Field Use
Lightweight and portable, this device is perfect for mobile hackrf portapack projects and field scanning scenarios.
Optimized for SDR Sales Market
Built with the SDR community in mind, offering compatibility, affordability, and solid reliability — perfect for sdr sales.
Real-Time Visualization and Signal Decoding
Analyze live signals with precision using this sdr receiver, whether you’re decoding communication protocols or exploring the RF spectrum.
About Us – OpenSourceSDRLab
A precision-focused manufacturing partner in smart displays and IoT hardware.
Core Manufacturing and Quality Capabilities
OpenSourceSDRLab specializes in the research, design, and manufacturing of smart LCD display modules, e-paper displays, and embedded IoT devices. With a complete in-house engineering team, we offer end-to-end services — from schematic design and PCB layout to firmware development and system integration. Our ISO 9001:2015-certified facility ensures consistent product quality, traceability, and compliance with international standards.
Production Capacity and Technical Strength
Our Shenzhen-based factory is equipped with advanced SMT production lines, reflow soldering equipment, and automated optical inspection (AOI) systems. We maintain a monthly output capacity of 300,000 units, and have successfully delivered over 1.2 million smart display solutions worldwide. These capabilities allow us to support both low-volume prototyping and high-volume manufacturing, with flexible lead times and responsive engineering support.
Sustainable Manufacturing Practices
We are committed to minimizing our environmental footprint through responsible production. All components are RoHS-compliant, and we continuously optimize our energy and material usage through lean manufacturing principles. We also aim to reduce waste across the product lifecycle by designing for reliability and repairability.
Transparent and Collaborative Customer Workflow
Our customer engagement process is designed for clarity, speed, and technical alignment. We begin with a detailed project consultation, followed by rapid prototyping and iterative engineering feedback. Once validated, we move to scalable production while maintaining full transparency on timelines, costs, and logistics. Our bilingual project managers ensure seamless communication throughout the development cycle.
Global Service Capabilities
Serving clients across over 30 countries — including North America, Europe, and Asia-Pacific — we are experienced in global compliance, shipping logistics, and multilingual technical support. We partner with reliable international couriers and freight forwarders to ensure timely and safe delivery of goods. Whether you're a startup, system integrator, or global brand, we provide localized support with global reach.
Let's build smarter, more reliable devices — together.
Contact us to explore tailored hardware solutions built to meet your market’s demands.
FAQ
Who are we?
We are your SDR sourcing Office in China. OpenSourceSDRLab is a reliable and trustworthy sourcing lab in China.
We focus on Software Defined Radio developing & educational products, and we can ONE-STOP SDR device sourcing services from sourcing, product development, factory production, QC/inspection etc.We have been doing this business for 7+ years. The core members of our team are engineers who have graduated with degrees in communication engineering and electronic information, and who have a keen interest in SDR technology. We specialize in SDR products, particularly those that support GNU Radio. We have established long-term partnerships with PCB manufacturing and patch production companies, and possess a comprehensive hardware debugging and RF testing environment. Our contributions to the community have been significant, as we have developed a series of popular products, provided a wealth of usage documentation, tools, and sample programs, thereby playing a crucial role in advancing the development and popularization of open source SDR technology.
How can we guarantee quality?
We follow a rigorous quality control system certified under ISO 9001:2015. Our factory uses advanced inspection technologies such as AOI, ICT, and aging tests to ensure each unit meets strict performance and reliability standards.
What can you buy from us?
Why should you buy from us and not other suppliers?
We are not just a contract assembler — we are a full-stack hardware development partner. With in-house engineering, firmware, and PCB design, we can offer deeper customization, better cost control, and stronger IP protection. Our clients benefit from rapid prototyping, flexible production, and long-term technical support.
What services can we provide?