The H4M is the compact, field-hardened evolution of the HackRF One. Combined with the Mayhem firmware, it transforms from a lab instrument into a mobile signal laboratory capable of intercepting and interacting with the digital airwaves anywhere on earth.
The open-source soul of the PortaPack. It turns a raw HackRF into a feature-rich signal analysis terminal with hundreds of built-in apps.
Eliminate the laptop. Capture, analyze, and replay signals directly from the palm of your hand using the 3.2-inch touchscreen.
Record raw I/Q data directly to a MicroSD card. Replay fixed-code signals like legacy garage doors or simple IoT commands with one touch.
Real-time decoding for ADS-B (Aircraft), AIS (Ships), TPMS (Cars), and AFSK (Pager/Data) signals displayed directly on screen.
Display
3.2" LCD
Battery
2500mAh Li-Po
Storage
MicroSD (FAT32)
Controls
4-Way / Encoder
Use a high-quality MicroSD card formatted to FAT32 for high-speed I/Q capture.
Install the latest Mayhem Firmware via the web flasher to unlock 50+ apps.
Open 'Looking Glass' to find signals visually across wide chunks of the band.
Select a signal and use the 'Capture' app to save the raw RF burst to your SD card.
Use the 'Replay' app to transmit the captured signal and confirm your intercept.
Full feature-set for the Mayhem Firmware / H4M Hardware stack
1 MHz – 6 GHz
Wideband coverage
20 MHz
Max instantaneous
Full-Span
Real-time visualization
Scrolling
History view
3D View
Advanced analyzer
C16 Recording
Capture and playback
FM/AM/WFM
Voice transmission
Simulation
Lab testing only
Legal Modes
Test tones/sweeps
OOK/FSK
Sub-GHz automation
Aircraft Map
Real-time tracking
Marine Tracking
Vessel identification
Pager Decode
Text extraction
NRF24L01
Drone/Peripheral sniffing
BLE MAC
Identity discovery
Utility Reading
Meter monitoring
Weather Balloons
Telemetry decode
Image Decode
Slow-scan TV
300-928 MHz
RX/TX enabled
Legacy OOK
Capture and replay
Expansion
H4M Hardware
10-15 dBm
Typical output
Built-in Mic/Spk
Voice support
Record raw RF bandwidth to .C16 files.
Transmit recorded captures back into the air.
Automatic frequency scanner to find active peaks.
Transmit FM voice via built-in or external mic.
Visualize local aircraft positions in real-time.
Wideband spectrum analyzer for sweeping ranges.
• Spectrum Responsibility: The HackRF is a wide-open transmitter. With a PortaPack, you can transmit on almost any frequency from 1MHz to 6GHz. Without proper licensing (Amateur Radio) or a Faraday cage, transmitting is illegal and can interfere with emergency services.
• The Catch: The HackRF is half-duplex. You cannot listen while you transmit. This means you must time your captures and replays carefully.
• Battery Management: Large captures and high-gain transmission drain the H4M battery rapidly. Always carry a power bank for extended field ops.