- Digital/Analog Double Modes
- 2200 mAh Large Battery Capacity
- Digital Encryption and Crystal Sound
- 32 Channels (2 Zone)
- Dual Time Slot
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1. Retevis RT81 Dual Time Slot UHF High Power DMR Two Way Radios
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10.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.
11. Various Application
RT81 high power dual-time radio for rescue, security, Firefighting
12. Radio Details
13. Specification
14. Package Includes
What’s in the Box?
- 1 x RT81 Two Way Radio
- 1 x Li-ion battery
- 1 x Antenna
- 1 x Adapter
- 1 x Charger
- 1 x Belt clip
- 1 x Sling
- 1 x Instructions
Package includes:
Spec
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℃~+60℃ |
Storage temperature | -40℃~+60℃ |
Continuous working time | Analog:15 hours,Digital:25 hours |
Battery capacity | 2200mAh |
Weight(include battery) | 9.32oz/264g |
Radio size(include battery) | 5.48x2.51x1.45in(139x64x37mm) |
Receiver | |
Channel spacing | 12.5/25KHz(Digital mode 12.5KHz) |
Frequency stability | ±1.0ppm |
Analog sensibility | 0.35µV/-116dBm(20dB SINAD) |
0.2µV/-120dBm(Typical) | |
Digital sensibility | 0.3µV/-117.4dBm(BER5%) |
0.7µV/-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 |
Audio response | +1dB—-3dB |
Rated audio distortion | ≤3% |
Transmitter | |
Channel spacing | 12.5/25KHz(Digital mode 12.5KHz) |
Frequency stability | ±1.5ppm |
TX power | Low:1W 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 | ETSITSI02361,-1,-3 |
Vocoder type | AMBE+2TM |
Note: Specifications will be revised without notice due to technical improvement.
Feature
Feature:
- 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
Product Reviews
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AC DESIGN ENGINEERINGReliable productReviewed on Aug 10,2023We purchased Retevis RT81 Radios for our production needs. Working in difficult construction conditions, in closed spaces and with the presence of obstacles, Retevis radios showed their best side, providing reliable communication. Thanks to the company for a quality product!jarrettAwesome productReviewed on Sep 30,2022Awesome productAbnergreat radioReviewed on Aug 04,2022great video. Very interesting.CQ DE UB3PEHeasy to useReviewed on Aug 04,2022I have a Retevis RT50, it's the same, but with a 200 channel encoder and digits. channel indication. For myself, I see one significant minus - you can find out the charge level only in the mode with voice acting. That is, if there is a radio mode without voice acting, then you will not recognize the charge. Thank you for the video.CQ DE UB3PEHeasy to useReviewed on Aug 04,2022I have a Retevis RT50, it's the same, but with a 200 channel encoder and digits. channel indication. For myself, I see one significant minus - you can find out the charge level only in the mode with voice acting. That is, if there is a radio mode without voice acting, then you will not recognize the charge. Thank you for the video.Joseph Kasteingreat radioReviewed on Aug 04,2022As always a good radio, Thanks!!!!Aisonwaterproof walkie-talkieReviewed on Aug 04,2022IP67 WATERPROOF radio is very goodtingood sound qualityReviewed on Aug 04,2022dmr radio have better sound qualityGuygreat radioReviewed on Aug 04,2022Use RT81P's digital encryption to make calls more secure, we are an information technology company, this is very good for usPalelong range radioReviewed on Aug 04,2022up to 5mi, so long range radio
Support
Firmware/Software
- RT81-UHF-Software-v1.05
- win11-DriverInstaller
The win11 driver is compatible with win10, win8 and win7 systems.