Advanced digital portable radio
Rx665
Empower Your Operation with Rx665 Series

Overview
Overview
Compact, lightweight, and powerful – the Rx665 Series delivers crystal-clear audio, extended coverage, long battery life, and exceptional durability. Designed for customer-facing teams, it ensures efficient communication, improved productivity, and uninterrupted service.
Key features
- Light & StylishSlim and lightweight design for easy portability with clear audio for professional-grade communication.
- Long Battery LifeOver 20 hours of usage with advanced lithium polymer battery – no need to recharge during shifts.
- Rugged & DurableMIL-STD-810G certified and IP67 rated – resists drops up to 2 meters and tough environmental conditions.
- Clear AudioPowerful speaker, AI noise cancellation, and water-porting technology ensure clear sound even in noisy or wet environments. AI-based noise cancellation reduces background noise and howling by up to 30dB, ensuring clear audio for the receiver regardless of the caller's noisy environment.
- Easy to UseThe Rx665 Series is compact, discreet, and user-friendly with tactile PTT, programmable buttons, and BT5.0 wireless connectivity – ideal for hands-free operation.
- Extended RangeEnhanced receiver sensitivity ensures reliable performance in weak signal areas, improving safety and communication for field teams.
Specifications
General
- Frequency Range
- UHF: 400-527MHz VHF: 136-174MHz
- Channel Capacity
- 1024
- Zone Capacity
- 64
- Zone Channels
- 256
- Channel Spacing
- 12.5kHz/20kHz/25kHz
- Operating Voltage
- 7.7V (rated)
- Battery
- 2000 mAh Li-polymer
- Battery Life (5/5/90)
- 20h (GNSS OFF); 16h (GNSS ON)
- Frequency Stability
- ±0.5ppm
- Antenna Impedance
- 50Ω
- Dimensions (H x W x D)
- 122 x 55 x 31.5mm
- Weight (with antenna & battery)
- 280g
- Display
- 160 x128pixels, 65536colors, 1.8inch, 6rows
- BT
- BT 5.0 BLE+EDR
Receiver
- Sensitivity
- Analog: 0.18μV (12dB SINAD); 0.16μV (Typical) (12dB SINAD); Digital: 0.18μV/BER5%
- Selectivity
- TIA-603: 60dB@12.5kHz / 70dB@20/25kHz; ETSI: 60dB@12.5kHz / 70dB@20/25kHz
- Intermodulation
- TIA-603: 70dB@12.5/20/25kHz; ETSI: 65dB@12.5/20/25kHz
- Spurious Response Rejection
- TIA-603: 70dB@12.5/20/25kHz; ETSI: 70dB@12.5/20/25kHz
- Blocking
- TIA-603: 80dB ETSI: 84dB
- Hum and Noise
- 40dB@12.5kHz; 43dB@20kHz; 45dB@25kHz
- Rated Audio Power Output
- 0.5W
- Rated Audio Distortion
- ≤3%
- Audio Response
- +1 ~ -3dB
- Conducted Spurious Emission
- <-57dBm
Transmitter
- RF Power Output
- UHF: 1W/4W VHF: 1W/5W
- FM Modulation
- 11K0F3E@12.5kHz; 14K0F3E@20kHz; 16K0F3E@25kHz
- 4FSK Digital Modulation
- 12.5kHz Data Only: 7K60FXD; 12.5kHz Data and Voice: 7K60FXW
- Conducted/Radiated Emission
- -36dBm<1GHz; -30dBm>1GHz
- Modulation Limiting
- ±2.5kHz@12.5kHz; ±4.0kHz@20kHz; ±5.0kHz@25kHz
- FM Hum & Noise
- 40dB@12.5kHz; 43dB@20kHz; 45dB@25kHz
- Adjacent Channel Power
- 60dB@12.5kHz; 70dB@20/25kHz
- Audio Response
- +1 ~ -3dB
- Audio Distortion
- ≤3%
- Digital Vocoder Type
- AMBE+2™
- Digital Protocol
- ETSI-TS102 361-1,-2,-3
Environmental
- Operating Temperature
- -30°C* ~ +60°C (*Radio only – Battery -20°C)
- Storage Temperature
- -40°C ~ +85°C
- ESD
- IEC 61000-4-2 (Level 4); ±8kV (contact); ±15kV (air)
- Dustproof & Waterproof
- IEC60529-IP67
- Humidity
- Per MIL-STD-810G Standard
- Shock and Vibration
- Per MIL-STD-810G Standard
Location Services
- GNSS
- GPS, GPS+GLONASS, GPS+BDS
- TTFF (Time To First Fix) Cold Start
- <1minute
- TTFF (Time To First Fix) Hot Start
- <10seconds
- Horizontal Accuracy
- <5meters
Features
- Operating Modes
- Analog conventional; Digital conventional; XPT
- Voice Service
- Private Call; Group Call; All Call; Emergency Call; Priority Interrupt
- Data Service
- Text Message; Quick Text Message
- Connection
- BT Audio; BT Data; GNSS (GPS, GLONASS, BDS); Open API
- Safety
- Emergency; Man Down; Lone Worker; Authentication; Air Interface Encryption; End-to-End Encryption; Disable/Enable
- Analog Mode
- 2-Tone signaling; 5-Tone Signalling*; HDC1200
- Supplementary
- Profiles; Programmable Buttons; Interface Switcher; Roaming; Remote Monitor; Radio Check; Alert Call
Downloads
Open to everyone
Datasheet (PDF)Rx665 · No registration neededDownload Rx665 datasheet (PDF)
Available after registration
Fill in a short form once to download:
- User manualRegister to download: Rx665 user manual
- Firmware and softwareRegister to download: Rx665 firmware and software
- Price listRegister to download: Rx665 price list
- Drawings and CAD filesRegister to download: Rx665 drawings and cad files
Accessories
Chargers and headsets must be used as the certificate allows.
Standard
- Charger
- Adapter (12V/1A)
- Li-polymer battery 2000mAh
- Antenna
- Belt clip
- Strap
Optional
- BT Wireless earpiece
- Programming cable (USB port)
- BT wireless ring PTT
- BT Wireless remote speaker microphone
- Wired earpiece
- Multi-unit charger
Approvals for Indian sites
Realix holds ATEX, IECEx, PESO, BIS and ISO certification at group level, and is listed on GeM.
Talk to us
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