1. Lebihview
The Retevis RT28 is a durable and compact two-way radio designed for reliable communication. It features a robust shell, integrated antenna, and user-friendly controls. This manual provides essential information for setting up, operating, and maintaining your RT28 radios.

Figure 1: Retevis RT28 two-way radios charging in the multi-gang charger.
2. Maklumat Keselamatan
Please read and understand all safety information before using the Retevis RT28 two-way radio.
- Pematuhan FCC: The FCC ID for our walkie-talkies is 2ASNSRT28. These walkie-talkies meet FCC Part 95 rules.
- Keselamatan Bateri: Use only approved Lithium-Ion batteries. Do not expose batteries to fire or extreme temperatures.
- mengecas: Use only the provided multi-gang charger or compatible USB charging cables.
- Tahan Air: Produk ini adalah Bukan Tahan Air. Avoid exposure to water or moisture.
- Antena: Jangan sentuh antena semasa penghantaran.
3. Kandungan Pakej
Sahkan bahawa semua item terdapat dalam pakej anda:
- 6 x Retevis RT28 Radio Dua Hala
- 6 x Bateri
- 6 x Belt Clips & Straps
- 1 x Six-Way Multi-Gang Charger

Rajah 2: Terperinci view of the Retevis RT28 package contents.
Video 1: Unboxing and assembly of the Retevis RT28 two-way radio components.
4. Ciri dan Komponen Produk
The Retevis RT28 is designed for durability and ease of use. Key features include:
- Antena Bersepadu: The antenna is securely mounted directly onto the radio, preventing detachment and improving durability.
- Robust Knobs: The channel selection and power/volume knobs are integrated for enhanced durability and reliable operation.
- Snap-on Belt Clip: The belt clip is designed for easy attachment and removal without screws, reducing wear and tear.
- Port Pengecasan USB: Allows for separate charging using a compatible USB cable.
- Fungsi VOX: Penghantaran diaktifkan suara untuk operasi bebas tangan.
- Penggera Tempatan: An emergency alarm function for critical situations.

Figure 3: Labeled components and dimensions of the Retevis RT28 two-way radio.
Video 2: Selesaiview of the Retevis RT28 walkie-talkie, highlighting its improved design and durability.
5. Persediaan
5.1 Pemasangan Bateri
- Sejajarkan pek bateri dengan bahagian belakang radio.
- Luncurkan pek bateri ke tempatnya sehingga ia berbunyi klik dengan selamat.
5.2 Mengecas
The RT28 radios can be charged using the included multi-gang charger or individually via the USB charging port.
- Multi-Gang Charger: Place the radios or individual batteries into the designated slots on the 6-way multi-gang charger. Ensure the indicator light illuminates, signifying active charging.
- Pengecasan USB: Connect a compatible USB cable to the USB port on the side of the radio. The radio can be charged separately using this method.

Figure 4: The multi-gang charging base, compatible with Retevis RT21, H-777S, and RT28 walkie-talkies.
6. Arahan Operasi
6.1 Kuasa Hidup/Mati dan Kawalan Kelantangan
Putar tombol paling atas mengikut arah jam untuk menghidupkan radio. Teruskan berputar untuk meningkatkan kelantangan. Putar lawan arah jam untuk mengurangkan kelantangan dan matikan kuasa.
6.2 Pemilihan Saluran
Rotate the second knob (channel selection knob) to choose one of the 16 available channels. Ensure all radios intended for communication are set to the same channel.
6.3 Butang Push-to-Talk (PTT)
Press and hold the large PTT button on the side of the radio to transmit your voice. Release the button to listen.
6.4 Fungsi VOX (Pertukaran Dikendalikan Suara)
Fungsi VOX membolehkan penghantaran bebas tangan. Apabila diaktifkan, radio akan menghantar secara automatik apabila ia mengesan suara anda.
- To activate/deactivate VOX: From channel 1 to channel 5, press and hold the PTT and side button at the same time to turn on the walkie-talkie. The VOX function will be activated or deactivated.
Video 3: Demonstration on how to activate or deactivate the VOX function on the Retevis RT28 walkie-talkie.
6.5 Local Alarm
The local alarm function can be activated in emergencies. Refer to the full user manual for specific activation steps.

Figure 5: Visual representation of VOX hands-free and Local alarm features.
7. Penyelenggaraan
- Pembersihan: Gunakan yang lembut, damp kain untuk membersihkan bahagian luar radio. Jangan gunakan bahan kimia atau pelarut yang keras.
- Penjagaan Bateri: Store batteries in a cool, dry place when not in use. Avoid overcharging or fully discharging batteries regularly to prolong their lifespan.
- Storan: When storing the radio for extended periods, remove the battery and store it separately.

Figure 6: The durable design of the Retevis RT28 ensures longevity.
8. Penyelesaian masalah
If you encounter issues with your Retevis RT28 radio, try the following common troubleshooting steps:
- Tiada Kuasa: Pastikan bateri dipasang dengan betul dan dicas sepenuhnya. Pastikan tombol kuasa/kelantangan dihidupkan.
- Tiada Penerimaan/Penghantaran: Verify that all radios are on the same channel. Check for obstructions or excessive distance between radios.
- Isu Pengecasan: Ensure the charger is properly connected to a power source and the radio/battery is correctly seated in the charging slot. Check the USB cable for damage if using individual charging.
- Kualiti Audio Lemah: Adjust the volume. Ensure the microphone and speaker are not obstructed.
For more detailed troubleshooting, please refer to the comprehensive user manual included with your product or visit the Kedai Retevis.
9. Spesifikasi
| Ciri | Spesifikasi |
|---|---|
| Berat Barang | 5.3 paun (jumlah pakej) |
| Dimensi Produk | 1.3 x 2.36 x 7.4 inci (setiap radio) |
| Nombor Model Item | FA9139AX3-C9059B |
| Bateri | 6 bateri Lithium Ion diperlukan (termasuk) |
| Bilangan Saluran | 16 |
| Julat Kekerapan | 462-467 MHz |
| Voltage | 3.7 Volt |
| Tahap Ketahanan Air | Bukan Tahan Air |
| warna | Hitam |
10. Waranti dan Sokongan
Retevis provides the following warranty for the RT28 two-way radios:
- Badan Radio: Waranti 2 tahun.
- Aksesori: jaminan 2 bulan.
- Pulangan: Polisi pemulangan tanpa sebab 30 hari.
Beyond the warranty period, maintenance services are still offered, with buyers responsible for associated costs.
For further assistance or to explore other Retevis products, please visit the official Kedai Retevis.





