ATS Mini V4 SI4732 Full-Band Pocket Radio FM AM SSB LSB
ATS Mini V4 SI4732 Full-Band Pocket Radio FM AM SSB LSB
ATS Mini V4 Full-Band Pocket Radio Receiver — SI4732 DSP Chip | FM AM LSB USB | Headphone Amplifier
Experience broadcast radio like never before with the ATS Mini V4 Full-Band Pocket Radio Receiver. Powered by the renowned SI4732 DSP chip and an ESP-32-S3 main controller, this compact powerhouse tunes across LW, MW, SW, and VHF bands — supporting FM, AM, LSB, and USB modes — all in a palm-sized form factor perfect for home listening, travel, shortwave enthusiasts, and amateur radio hobbyists.
Made in Mainland China.
Key Features
- All-Band Coverage: Receives LW/MW/SW (150 kHz–30 MHz) and VHF (64–108 MHz), including FM, AM, LSB, and USB modes for maximum versatility.
- SI4732 DSP Chip: Industry-trusted digital signal processing delivers outstanding tuning sensitivity and selectivity across all supported bands.
- 1.9" IPS Color Display: A crisp 170×320 resolution screen with 32–255 adjustable brightness levels and real-time battery status keeps you in full control.
- Built-In 1W Cavity Speaker: Rich, room-filling audio from a compact chassis — ideal for tabletop or outdoor listening without headphones.
- High-Impedance (Hi-Z) Headphone Amplifier: An upgraded Hi-Z circuit at the antenna front end maximizes weak-signal clarity and powers high-impedance headphones with authority.
- V4 Upgraded RF Design: Shielding cover on the SI4732 receiver section suppresses electromagnetic interference; ESD protection chips guard the antenna input; stable VCC_RADIO power supply preserves signal resonance.
- Wired Headphone FM Antenna: Use your own wired headphones as an FM antenna in strong-signal environments (cable length matters for best results).
- Firmware Upgradable: Keep your device current with hassle-free over-the-wire firmware updates via the ESP-32-S3 module.
- Dual Housing Options: Choose between rugged CNC-machined aluminum alloy or lightweight ABS plastic — note that the metal version offers superior interference resistance but may reduce nearby Wi-Fi signal strength.
- USB-C Charging: Convenient Type-C charging port (standard chargers only — fast chargers not supported) paired with an 800 mAh battery.
Technical Specifications
| Main Controller | ESP-32-S3 |
| DSP Chip | SI4732 |
| Modes | FM / AM / LSB / USB |
| Frequency Range | LW/MW/SW: 150 kHz–30 MHz | VHF: 64–108 MHz |
| Display | 1.9" IPS Color, 170×320 px, 32–255 brightness levels |
| Speaker | Built-in 1W cavity speaker |
| Audio Jack | 3.5 mm 3-pin stereo |
| Antenna Connector | SMA-KE (female) |
| Charging Port | USB Type-C (standard chargers only) |
| Battery | 800 mAh (included) |
| Dimensions | ~80 × 35 × 20 mm / 3.15 × 1.38 × 0.79 in |
| Housing Options | CNC Aluminum Alloy or ABS Plastic |
| Country of Origin | Mainland China |
What's in the Box
- 1 × ATS Mini V4 Radio Receiver
- 1 × Donut (Loop) Antenna
- 1 × Telescopic Antenna
- 1 × Instruction Manual
Please Note: Headphones are not included. The headphones shown in product images are for illustration of FM antenna functionality only. Please supply your own headphones. Color may vary slightly from images due to monitor settings and lighting. Allow 1–2 cm measurement tolerance due to manual measuring.
For more on radio spectrum and amateur radio frequencies, visit the FCC or learn about electromagnetic spectrum standards at NIST Electromagnetic Metrology.
Learn more: Broadcast radio receiver
Frequently Asked Questions
Q: What radio bands does the ATS Mini V4 SI4732 receiver support?
A: The ATS Mini V4 covers LW/MW/SW from 150 kHz to 30 MHz and VHF from 64–108 MHz, supporting FM, AM, LSB, and USB operating modes. Note that aeronautical bands are not supported.
Q: Does the ATS Mini V4 include headphones or a battery?
A: A built-in 800 mAh rechargeable battery is included and charges via USB Type-C. Headphones are not included — please bring your own 3.5 mm stereo headphones to use the high-impedance headphone amplifier.
Q: Can I upgrade the firmware on the ATS Mini V4?
A: Yes. The ESP-32-S3 main controller supports hassle-free firmware upgrades, allowing you to access the latest features and performance improvements as they become available.
Q: What is the Hi-Z circuit and why does it matter?
A: The High-Impedance (Hi-Z) circuit is positioned at the front end of the antenna path to improve weak-signal resolution. This means the radio can distinguish and decode faint shortwave and medium-wave stations more clearly, even in challenging listening environments.
Q: Will the CNC metal housing affect my Wi-Fi or other wireless devices?
A: The CNC-machined aluminum alloy housing provides excellent shielding against electromagnetic interference for the radio itself, but the metal casing may also attenuate nearby Wi-Fi signals. If strong Wi-Fi connectivity nearby is a priority, consider the ABS plastic housing option.