1. Bubuka
This manual provides detailed instructions for the SOOMFON BT021 Bluetooth 5.3 2-in-1 Transmitter Receiver. It covers product features, setup, operation, maintenance, and troubleshooting to ensure optimal performance and user experience. Please read this manual thoroughly before using the device.

Image 1: SOOMFON BT021 Bluetooth 5.3 2-in-1 Transmitter Receiver. This image displays the compact device with its 3.5mm audio jack, control buttons, and mode switch.
2. Produk Langkungview
The SOOMFON BT021 is a versatile Bluetooth 5.3 adapter designed to function as both a transmitter (TX) and a receiver (RX). It enables wireless audio streaming for various devices, enhancing connectivity for non-Bluetooth enabled equipment.
2.1 Fitur konci
- Téknologi Bluetooth 5.3: Provides stable and efficient wireless audio transmission with low latency.
- Fungsi 2-in-1: Operates as both a Bluetooth audio transmitter and receiver.
- Mikropon internal: Supports hands-free calling in receiver mode.
- Pangurangan Noise CVC 8.0: Ngurangan bising latar tukang pikeun telepon anu langkung jelas.
- Audio Kasatiaan Luhur: Professional HD audio decoding chip for quality sound.
- Hirup batré anu panjang: Up to 8 hours in RX mode, 6.5 hours in TX mode.
- Kasaluyuan lega: Connects to devices with 3.5mm audio input/output.
2.2 Eusi pakét

Image 2: Package contents of the SOOMFON BT021. This image shows the Bluetooth adapter, a USB-C charging cable, a 3.5mm auxiliary cable, a 3.5mm connector, and the user manual.
Punten parios yén sadaya barang aya dina pakét:
- SOOMFON BT021 Bluetooth 5.3 Transmitter Receiver x1
- Kabel Ngecas USB-C x1
- 3.5mm Auxiliary Cable x1
- 3.5mm Panyambung x1
- Buku Panduan x1
3. Tata perenah

Image 3: Diagram illustrating the various parts and controls of the SOOMFON BT021. It highlights the 3.5mm audio port, microphone, multi-function button (MFB), volume/track control buttons, TX/RX mode switch, and charging port.
- Port Audio 3.5mm: For connecting to audio input/output devices.
- Mikropon: Pikeun telepon handsfree.
- Tombol Multi-fungsi (MFB): Power ON/OFF, Play/Pause, Answer/End Call, Reject Call, Redial.
- Tombol Volume + / Trek Salajengna: Pencét pondok pikeun polumeu ka luhur, pencét panjang kanggo lagu salajengna.
- Tombol Volume - / Trek Saméméhna: Pencét pondok pikeun volume handap, pencét lila pikeun lagu saméméhna.
- TX/RX Mode Switch: Toggles between Transmitter and Receiver modes.
- Port Ngecas (USB-C): Pikeun ngecas alat.
4. Setup jeung papasangan
4.1 Ngecas Alat
Before initial use, fully charge the device. Connect the provided USB-C charging cable to the device's charging port and a USB power source (e.g., computer USB port, USB wall adapter). The LED indicator will show charging status and turn off when fully charged.
4.2 Receiver Mode (RX) Setup
In RX mode, the device receives Bluetooth audio from your phone/tablet and outputs it to a non-Bluetooth audio system (e.g., car stereo, home stereo, wired headphones).
- Switch the mode selector to RX.
- Connect the BT021 to your audio system's 3.5mm AUX input using the provided audio cable or connector.
- Power on the BT021 by pressing and holding the MFB for 3 seconds until the LED flashes blue and red, indicating pairing mode.
- On your mobile device (smartphone, tablet), enable Bluetooth and search for "SF-BT021" in the list of available devices.
- Select "SF-BT021" to pair. The LED will turn solid blue once connected.
- Play audio on your mobile device, and it will stream wirelessly to your connected audio system.

Image 4: Visual guide for connecting the SOOMFON BT021 in Receiver (RX) mode. It shows switching to RX, connecting to a car stereo, enabling Bluetooth on a phone, and pairing with "SF-BT021".
4.3 Transmitter Mode (TX) Setup
In TX mode, the device transmits audio from a non-Bluetooth source (e.g., TV, computer, MP3 player) to Bluetooth headphones or speakers.
- Switch the mode selector to TX.
- Connect the BT021 to your audio source's 3.5mm audio output (e.g., TV headphone jack) using the provided audio cable.
- Power on the BT021 by pressing and holding the MFB for 3 seconds until the LED flashes blue and red, indicating pairing mode.
- Pasang headphone atanapi spiker Bluetooth anjeun kana mode papasangan.
- The BT021 will automatically search for and connect to nearby Bluetooth audio devices. The LED will turn solid blue once connected.
- Play audio from your source device, and it will stream wirelessly to your Bluetooth headphones/speaker.

Image 5: Visual guide for connecting the SOOMFON BT021 in Transmitter (TX) mode. It shows switching to TX, connecting to a TV's AUX port, putting Bluetooth headphones in pairing mode, and automatic pairing.
5. Parentah Operasi
5.1 Daya Hurung/Pareuman
- Daya Hurung: Press and hold the MFB for approximately 3 seconds until the LED indicator lights up.
- Pareum listrik: Press and hold the MFB for approximately 3 seconds until the LED indicator turns off.
5.2 Music Playback Control (RX Mode)
- Puter / Reureuh: Pencét pondok MFB.
- Volume Up: Short press the "Volume +" button.
- Volume Turun: Short press the "Volume -" button.
- Lagu salajengna: Pencét lila tombol "Volume +".
- Lagu Sateuacanna: Pencét lila tombol "Volume -".
5.3 Call Management (RX Mode)
- Ngajawab / mungkas Telepon: Pencét pondok MFB.
- Nolak Telepon: Pencét lila MFB salila 2 detik.
- Telepon deui Nomer Panungtungan: Pencét dua kali MFB.

Image 6: The SOOMFON BT021 being used in a car for hands-free calling. This demonstrates the device's microphone and CVC 8.0 noise cancellation features for clear communication while driving.
6. Pangropéa sarta perawatan
- Tetep alat tetep garing. Uap bisa ngaruksak sirkuit internal.
- Ulah ngalaan alat ka suhu ekstrim.
- Hindarkeun ragrag atanapi ngagentoskeun alat kana tabrakan anu kuat.
- Bersihkeun alatna nganggo lawon anu lemes sareng garing. Entong nganggo bahan kimia atanapi deterjen anu keras.
- Simpen alat dina tempat anu tiis sareng garing upami henteu dianggo kanggo waktos anu lami.
7. Cara ngungkulan
| Masalah | Mungkin Cukang lantaranana | Solusi |
|---|---|---|
| Alat teu hurung. | batré lemah. | Ngecas alat sapinuhna nganggo kabel USB-C nu disadiakeun. |
| Teu tiasa dipasangkeun sareng alat. |
|
|
| Teu aya audio atanapi kualitas audio anu goréng. |
|
|
| Call quality is poor (RX mode). |
|
|
8. Spésifikasi
| Ngaran modél | BT021 |
| Vérsi Bluetooth | 5.3 |
| Bluetooth Profiles | A2DP, AVRCP, HFP, HSP |
| Audio Codecs | SBC, AAC |
| Rentang Operasi | Nepi ka 10 méter (33 suku) |
| Kapasitas batré | 250 mAh Litium-ion |
| Waktu Ngecas | Kurang leuwih 1.5 jam |
| Working Time (RX Mode) | Nepi ka 8 jam |
| Working Time (TX Mode) | Nepi ka 6.5 jam |
| Input / Kaluaran | 3.5mm Audio Jack |
| Port ngecas | USB-C |
| Fitur husus | CVC 8.0 Noise Cancellation, Built-in Microphone, Low Latency |
9. Garansi jeung Rojongan
SOOMFON products come with a standard manufacturer's warranty. For specific warranty details, please refer to the warranty card included in your package or visit the official SOOMFON websitus.
If you encounter any issues or have questions regarding your SOOMFON BT021, please contact our customer support team. Our team is available to assist you within 24 hours.
Kontak Rojongan Palanggan: Please refer to the contact information provided on the product packaging or the official SOOMFON websitus.





