Retevis RT81 Remote Control

Overview

• Retevis RT81V High Power IP67 VHF DMR Radio

Digital Encryption

Secure communications are an essential requirement, especially for public safety applications, RT81 is equipped with 10-bit key data encryption, walkie talkie prevents eavesdropping and avoids interference to ensure secure communication.

Long Battery Life

Built-in 2200 mAh battery, an operating time of 15 hours in analog mode and 25 hours in digital mode, and is suitable for daily use.

Crystal Sound

Security personnel typically work in a busy, noisy environment. The sound quality of the walkie-talkie is especially important. Due to the built-in high quality speakers, the DMR walkie-talkie provides better noise cancellation. In a noisy environment, it is possible to communicate with others in better quality.

Sturdy Body

In the security process, it often happens that the walkie-talkie falls down by running. Therefore, there are certain requirements for the fall resistance of the walkie talkie. A robust shell with stronger protection against falls and earthquakes is more durable.

High/Low Power Selection

High power has a longer call range. Low power has a longer battery life. The selection between high and low power can be used flexibly, allowing you to choose the appropriate power in different situations.

Private/Group Call

For security, it is necessary to communicate. The walkie-talkie supports individual and group call with ID, by setting the frequency, time slot, etc. to meet complex communication requirements.

Digital /Analog

Since the walkie talkie is compatible with both analog and digital modes. It not only retains the analog radio function, but also has the advantages of digital radio, such as better radio performance and longer battery life, higher energy efficiency, and in the meantime reduces the cost of equipment replacement.

Dual Time Slot

The walkie talkie has three modes: simplex, repeater, and simplex dual time slot. In simplex mode, the walkie talkie communicates in different time slots, which improves communication efficiency. In Repeater mode, the walkie talkie increases the communication distance. Dual Time Slot expands the channel capacity and extends the communication distance.

Six Advantages of DMR

DMR technology offers six benefits, including doubling the capacity of existing licensed channels, backward compatibility with legacy systems, longer battery life, and increased energy efficiency that improves working efficiency, extends walkie talkie life, and reduces equipment replacement costs.

Various Application

RT81 high-power dual-time radio for rescue, security, Firefighting

Radio Details

What’s in the Box

Package includes:

• 2 x RT81V Two-Way Radio
• 1 x Programming Cable
• 2 x Li-ion battery
• 2 x Antenna
• 2 x Adapter
• 2 x Charger
• 2 x Belt clip
• 2 x Sling
• 2 x Instructions

Specification

• Model: 
  • Retevis RT81
• Frequency
  • UHF 400-470MHz
• Mode 
  • Digital/Analog
• Power
  • 10W
    
• Channel Capacity
  • 32(2 Zone, 16 channel per zone)
• Zone 
  • 2
• Working Voltage
  • 7.4V
• Working Temperature 
  • -30°C—+60°C
• Storage Temperature
  • -40°C—+60°C
• Continuous Working Time
  • Analog: 15 hours, Digital:25 hours
• Battery Capacity
  • 2200mAh
• Weight(include battery)
  • (9.32oz/264g)
• Radio Size(include battery)
  • 5.48×2.51×1.45in(139x64x37mm)

RECEIVER

• Channel Spacing
  
  • 12.5KHz/25KHz(Digital mode 12.5KHz)
    Frequency Stability
  • $1.0ppm
    
• Analog Sensibility
  • 0.35uV/-116dBm(20dB SINAD)
    
  • 0.2uV/-120dBm(Typical)
• Digital Sensibility
  • 0.3uV/-117.4dBm(BER5%)
  • 0.7uV/-110dBm(BER1%)
• Spurious Response
  • TIA03C:65dB / ETSI:65dB
• Adjacent Channel Selectivity
  • TIA603C:60dB 12.5KHz
  • ETSI:60dB 12.5KHz
• spurious Response Suppression
  • TIA603C:70dB ETSI:70dB
• Receiving Spurious Emissions
  • <-57dBm 1GHZ,>-47dBm
• Blocking
  • 84dB
• Rated Audio Power
  • 1W
• Rated Audio Distortion
  • <=3%

TRANSMITTER

• Channel Spacing
  
  • 12.5KHz/25KHz(Digital mode 12.5KHz)
• Frequency Stability
  • ‡1.5ppm
• TX Power
  • Low:5W High: 10W
• FM Noise
  • -40dB 12.5kHz
• Spurious Emission
  • <-36dBm 1GHz,>-30dBm
• Adjacent Channel Selectivity
  • -60dB 12.5KHz
• FM Modulation Mode
  • 12.5KHz:11FOF3E
• 4FSK Digital Modulation Mode
  • 12.5KHz(data only)7K60FX
  • 12.5KHz(data +voice) 7K60FX
• Modulation Limit
  • 2.5KHz 12.5KHz
• Audio Response
  • +1dB—-3dB
• Rated Audio Distortion
  • <-3%
• Digital Protocol 
  • ETSITSIO2361,-1,-3
• Vocoder Type 
  • AMBE+2TM

Feature

• IP67 Waterproof and Dustproof
• Private call, group call, all call in digital mode
• Encryption
• Wideband/Narrow band selection
• Online update
• Busy channel lockout
• English and Chinese audio prompt
• Time out timer
• TX high/Low power selection
• Read and write by computer
• Digital/analog double modes
• 32 Channels(2 Zone)
• Talk around
• Side key programmable
• Battery indicator
• End-tone elimination
• VOX function
• Double time slot
• Battery save/Low battery alarm
• Monitor

FAQs

• Q: How do I change the batteries in the remote control?
  • A: To change the batteries, follow the steps outlined in the user manual: Open the battery compartment, remove the old batteries, insert two new 3V batteries correctly, and close the compartment securely.
• Q: What is the typical range of the remote control?
  • A: The remote control has a transmit distance of 50-100 meters under normal operating conditions.

Documents / Resources

Retevis RT81 Remote Control [pdf] Owner's Manual RT81 Remote Control, RT81, Remote Control, Control

References

• User Manual