Retevis RB645
Retevis RB645 PMR446 Dual PTT Walkie Talkie Instruction Manual
Zavedení
Thank you for choosing the Retevis RB645 PMR446 Dual PTT Walkie Talkie. This manual provides essential information for the safe and efficient operation of your device. Please read it thoroughly before use and keep it for future reference.
Bezpečnostní informace
For detailed safety guidelines, please refer to the official safety document:
Obsah balení
Při vybalování se ujistěte, že jsou přítomny všechny položky:
- Retevis RB645 Two-Way Radio (4 units)
- Spona na opasek (4 jednotky)
- Sling (4 units)
- USB-C Charging Cable (2-in-1)
- 1100mAh Li-ion baterie (4 kusy)

Image: Contents of the Retevis RB645 package, including four walkie-talkies, four belt clips, four slings, a charging cable, and four lithium-ion batteries.
Konec produktuview a klíčové vlastnosti
The Retevis RB645 is a compact and professional PMR446 two-way radio designed for reliable communication. Key features include:
- Dual PTT Design: Features both a front and a side Push-to-Talk button for convenient operation with either hand.
- Funkce VOX: Enables hands-free communication, allowing you to transmit by voice activation.
- Clear Sound with Squelch: High-quality speaker and adjustable squelch (0-9 levels) ensure clear transmission and reception, even in noisy environments.
- Nouzový alarm: Activate local and remote alarms by pressing the side button 2 for immediate assistance.
- Nabíjecí USB-C: Equipped with an 1100mAh Li-ion battery and a USB-C port for versatile charging options.
- Provoz bez licence: Operates on PMR446 frequencies, requiring no license for use.
- Kompaktní a přenosné: Measures 106mm x 53mm x 18mm, making it easy to carry.

Image: The Retevis RB645 walkie-talkie highlighting its dual PTT buttons, located on the front and side for flexible use.

Image: Illustration showing two Retevis RB645 walkie-talkies communicating with clear sound, indicating the squelch function for noise reduction.

Image: A person on a bicycle using the Retevis RB645 walkie-talkie, demonstrating the VOX function for hands-free operation.

Image: The Retevis RB645 walkie-talkie with its emergency alarm activated, showing a red light, in a scenario where assistance might be needed.
Průvodce nastavením
1. Instalace a nabíjení baterie
The Retevis RB645 uses a rechargeable 1100mAh Li-ion battery. Before first use, fully charge the battery.
- If not already installed, carefully insert the Li-ion battery into the battery compartment on the back of the walkie-talkie, ensuring correct polarity.
- Připojte dodaný nabíjecí kabel USB-C k portu USB-C na boku vysílačky.
- Plug the other end of the charging cable into a compatible USB power source (e.g., wall adapter, car charger, power bank).
- Kontrolka nabíjení bude ukazovat stav nabíjení. Úplné nabití obvykle trvá přibližně 3 hodin.

Image: The Retevis RB645 walkie-talkie connected to a USB-C charging cable, illustrating different power sources for recharging.
2. Připevnění příslušenství
Attach the belt clip or sling for convenient carrying.
- Spona na opasek: Zarovnejte klip na opasek s drážkami na zadní straně rádia a zasuňte jej dolů, dokud nezacvakne na místo.
- Sling: Thread the sling through the designated loop on the top or side of the radio.
Návod k obsluze
1. Zapnutí/vypnutí
Press and hold the power button (usually marked with a circle and vertical line) located on the front panel until the device powers on or off.
2. Výběr kanálu
Use the "CH+" and "CH-" buttons on the front panel to select your desired communication channel. The RB645 supports 16 channels.
3. Provoz funkce Push-to-Talk (PTT)
The RB645 features a dual PTT design for ease of use:
- Front PTT: Press the large circular PTT button on the front of the radio to transmit. Release to receive.
- Side PTT: Use the PTT button located on the side of the radio for an alternative transmission method. Press to transmit, release to receive.
4. Funkce VOX (hlasově ovládaná ústředna)
Funkce VOX umožňuje handsfree vysílání. Po aktivaci bude rádio automaticky vysílat, jakmile detekuje váš hlas.
- Refer to the full user manual (if available) or device settings for specific instructions on how to activate and adjust VOX sensitivity.
5. Funkce umlčení šumu
Squelch eliminates background noise when no signal is being received. The RB645 offers 0-9 levels of squelch adjustment.
- Higher squelch levels require a stronger signal to open the receiver, reducing unwanted noise but potentially missing weak signals. Lower levels allow weaker signals but may pick up more background noise.
- Adjustment typically requires programming software or specific key combinations not detailed here.
6. Nouzový alarm
In an emergency, you can activate the alarm function:
- Press and hold the side button 2 (often the lower side button) to activate both local and remote emergency alarms.
7. Zámek kanálu
To prevent accidental channel changes, you can lock the channel:
- Press and hold the appropriate button (as indicated by the image, likely a side button) for 3 seconds to lock the channel. Repeat to unlock.

Image: The Retevis RB645 walkie-talkie with a visual cue for channel locking, indicating a 3-second press on a button.
Údržba
- Čištění: Použijte měkký, damp hadříkem k čištění vnější strany rádia. Nepoužívejte agresivní chemikálie ani rozpouštědla.
- Péče o baterie: Chcete-li prodloužit životnost baterie, vyvarujte se jejího přebíjení nebo úplného vybití. Pokud rádio a baterii delší dobu nepoužíváte, skladujte je na chladném a suchém místě.
- Voděodolnost: The RB645 is rated IP54 for water resistance, meaning it is protected against dust ingress and splashing water from any direction. It is not designed for submersion. Ensure the USB-C port cover is securely closed to maintain water resistance.
Odstraňování problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Rádio se nezapne. | Baterie je slabá nebo není správně nainstalována. | Nabijte baterii. Ujistěte se, že je baterie správně vložena. |
| Nelze vysílat ani přijímat. | Vybrán nesprávný kanál. Mimo dosah. Slabá baterie. | Ověřte, zda jsou obě rádia na stejném kanálu. Přesuňte se blíže k druhému rádiu. Nabijte baterii. |
| Špatná kvalita zvuku nebo statický šum. | Weak signal. Squelch level too low/high. Interference. | Move to an open area. Adjust squelch level. Avoid sources of electronic interference. |
| Životnost baterie je krátká. | Battery is old or not fully charged. Frequent transmissions. | Ensure battery is fully charged. Consider replacing old batteries. Reduce transmission time. |
Specifikace
| Funkce | Detail |
|---|---|
| Číslo modelu | RB645 |
| Značka | Retevis |
| Barva | Černý |
| Rozměry (D x Š x V) | 1.8 x 5.5 x 13.5 cm (0.7 x 2.17 x 5.31 palce) |
| Hmotnost | 103 gramů (0.23 lb) |
| Typ baterie | Lithium-iontová (1100 mAh) |
| svtage | 3.7 voltů |
| Počet kanálů | 16 |
| Frekvenční rozsah | 446.00625 - 446.19375 MHz (PMR446) |
| Maximální dosah hovoru | 2 kilometry (1.24 míle) |
| Speciální funkce | Emergency Alarm, VOX, Dual PTT, Squelch |
| Úroveň odolnosti proti vodě | IP54 (ochrana proti prachu, ochrana proti stříkající vodě) |
| Kompatibilní zařízení | PMR446 devices and compatible headsets |
| Úroveň hluku | 40 decibelů |
Záruka a podpora
Retevis offers a comprehensive warranty and support for your RB645 walkie-talkie:
- Záruční doba: 3letá záruka na tělo rádia a 1letá záruka na příslušenství.
- Zásady vrácení: 30denní lhůta pro vrácení bez udání důvodu.
- Pozáruční servis: Maintenance services are available beyond the warranty period; associated costs will be borne by the buyer.
- Kontaktujte podporu: For any inquiries or support needs, please contact us through Amazon. We aim to respond within 12 hours.
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