Si4732-ESP32 V3 Mini Radio Pocket Shortwave Receiver - Compact Power

In this review the Si4732-ESP32 V3 Mini Radio proves to be a compact, feature-packed receiver for hobbyists who want reliable multi-band coverage without a large desktop rig. The single biggest reason to buy is its combination of the SI4732 radio IC and ESP32 processing with the new Firmware 3.0, which noticeably improves seek sensitivity and makes station discovery much easier; that update also simplifies future flashing and keeps the device current. For anyone who needs portable HF, SW, MW and VHF listening in a pocket-sized unit, this is worth considering.

Key Features

• New Firmware 3.0: Improved seek sensitivity and easier firmware flashing make tuning faster and upgrades straightforward.
• Built-in Hi-Z and Headphone Amplifier: Enhances audio volume and clarity while improving reception with configurable bandwidth and AGC settings.
• Multi-mode Reception: Supports AM, FM, LSB and USB so users can listen to standard broadcasts and single-sideband ham and utility signals.
• Compact Dimensions: At roughly 3 x 1.4 x 0.8 in the pocket-sized chassis is easy to carry for outdoor activities like fishing and walks.
• Bright IPS Display: The 1.9-in color screen with adjustable brightness makes frequency and mode information easy to read in varied lighting.
• Long Battery Life: The built-in 800mAh battery delivers about 10 hours of listening between charges for extended portable use.

Who It's For

This receiver is aimed at shortwave listeners and radio hobbyists who value portability and adjustable receiver parameters such as bandwidth, AGC and soft mute. It is also a good fit for outdoor users who want a compact all-band receiver for travel, parks or short trips where a lightweight unit with long battery life matters.

Those who need broadcast-grade AM/FM stereo fidelity or expect a large external antenna for weak-signal shortwave DXing may want a larger tabletop radio or a dedicated receiver; the included telescopic antenna is convenient but some users reported mixed results for SW and AM reception compared to a full-size antenna.

Pros & Cons

Pros

• Compact and lightweight for true pocket portability while still covering HF, SW, MW and VHF.
• Firmware 3.0 brings better seek sensitivity and easier upgrades, improving the tuning experience.
• Built-in Hi-Z circuit and headphone amplifier provide stronger output and improved signal handling.
• Clear 1.9-in IPS screen with adjustable brightness helps navigate settings outdoors.

Cons

• The small telescopic antenna and compact size mean some users may need an external antenna for optimal SW/AM DX performance.
• Audio and display quality received mixed feedback, so expectations should match the unit's compact class.

Specifications

Model	Si4732-ESP32 V3 Mini Radio
Reception Modes	AM / FM / LSB / USB
Bands	HF (SW) / MW / VHF (FM)
Display	1.9-in IPS color screen, adjustable brightness
Battery	800mAh, approx 10 hours
Size	About 3 x 1.4 x 0.8 in
Special features	Built-in Hi-Z circuit, headphone amplifier, configurable bandwidth and AGC

Our Verdict

The Si4732-ESP32 V3 Mini Radio is a strong value for hobbyists who need a truly portable all-band receiver with modern firmware and useful audio hardware upgrades. It pairs excellent sensitivity and anti-interference performance with convenient battery life and a bright display, making it a smart choice for outdoor listening and casual shortwave exploration, while serious DXers may prefer a larger set or external antenna for best weak-signal results.

Frequently Asked Questions

Does it support single-sideband reception?
Yes, the receiver supports LSB and USB and includes an adjustable BFO for fine tuning SSB signals.

How long does the battery last?
The built-in 800mAh battery provides about 10 hours of listening under typical use.

Is the firmware easy to update?
Yes, Firmware 3.0 was designed to make flashing and future upgrades straightforward for users.