Mini Radio (ESP32 SI4732 Receiver)

Hi! The name of our team is AMNVOLT, and we promise that we will continue to use the best materials to make this mini radio, and continue to improve its hardware.

We are also very, very grateful to @OM0ET and Dave for their great and outstanding contributions to this radio! Their continued selfless dedication has led to a lot of hardware and software improvements for this radio.

Due to the presence of low-quality products from substandard manufacturers on the market—which may use inferior screens, main control chips, or even poor-quality batteries—users may experience degraded performance, and the hardware may not support the latest firmware updates.

We have listed on this website the stores that sell high-quality products manufactured by us. Feel free to choose and purchase from them:

V1 :

We have stopped the production and sale of V1.

V2 :

1. Ultra Gadgets Store

2. TOOLTOP Global Store

3. TOOLTOP Global Store(with new look)(We recommend that you place the order in this store. This store is an AE choice store)

4. Ongoing update....

V3 :

1. Gear Master Store

2. TOOLTOP Global Store

3. Ultra Gadgets Store(We recommend that you place the order in this store. This store is an AE choice store)

4. Store for US buyers

5. TOOLTOP Global Store(with 2pcs antennas)(We recommend that you place the order in this store. This store is an AE choice store)

6. Ongoing update....(If the store you purchased from is not listed here, a radio bearing the AMNVOLT logo confirms it is a genuine product. (Due to limited page space, we cannot display all sales links.))

The knob cap with a better feel for replacement : Knob Cap

How to distinguish radio versions when purchasing :

1. Check the exterior design as shown in the images. (Note: Some V2 radios retained the V1 design during production - contact the seller's customer service for confirmation)

2. Verify both front and back panels: Radios printed with our brand "AMNVOLT" are 100% genuine V3 models (with built-in headphone amplifier and Hi-Z)

3. Review product listing comments to see images shared by other buyers.

Operation Guide:

1. Double-click the button on the home screen to enter the menu

2. On the menu page, rotate the knob to switch the menu and mode, etc. Click again to "Confirm".

3. On the home screen, rotate the knob to change the frequency band, and click again to confirm.

4. Because the case is very small,so the volume output is low after the earphone is inserted, which is a normal phenomenon, and the external audio can be connected to reach a larger volume.

Upgrade Method

1. Please use Windows 10 system to run [Flash Download Tool.zip]

2. Select the [ChipType:ESP32-S3]->[WorkMode:Devoelop]->[LoadModel:USB]

3. Select first bin file "xxxx.ino.bootloader.bin" @ "0x0"

Select second bin file "xxxx.ino.partions.bin" @ "0x8000"

Select third bin file "xxxx.ino.bin" @ "0x10000"

4. Just connect the USB Typec, keep the MINI RADIO power on, and wait for ~10 seconds for the computer to find it.

5. Set "COM: XXXXX",and click [START]

6. After the upgrade is completed, you can enjoy it

Tip:If the burning fails and the system cannot be started, don't worry, the ESP32 system will not be destroyed, you just need to re-burn it.

If you have any business cooperation or pre-sale/after-sale consultation, please contact: potostudio@163.com