RT81 Dual Time Slot High Power UHF DMR Radio

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- Digital/Analog Double Modes
- 2200 mAh Large Battery Capacity
- Digital Encryption and Crystal Sound
- 32 Channels (2 Zone)
- Dual Time Slot
NOTE: Please download the Programming Software from “SUPPORT”
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- We offer free shipping straight to your door throughout the contiguous.
- It usually takes 3-20 business days* for your package to be delivered, so you can sit back and relax, worry-free.
- *Please see our shipping policy for more details.
In case of Buyer's Remorse(not product fault), within one month after product received, The customers can return it for a refund.
See our refund policy for more details about what is needed for a smooth refund process.
Retevis provides a straightforward, hassle-free warranty to save you some headaches. All products come with their own unique warranty that you can find on the product listing or contact us at info@retevis.com with your order receipt for confirmation.
This limited warranty provided by the manufacturer in no way affects a potential statutory warranty provided by law.
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OverView
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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Denis Eeasy to useReviewed on Aug 01,2022DMR RADIO and 10w high radio, i test, 8W, BUT THE difference is small, so the great radiolilywaterproof walkie-talkieReviewed on Aug 01,2022ip67 watetrproof, very good, it's great radioroberthigh power radioReviewed on Aug 01,202210W high power, long distance radioClyde Osterhoutgreat radioReviewed on Jul 14,2022radios are good we use in auto salvage yard, we now have 6 radios and they work great on our 10 acre prorerty.Cliff Englelong rangeReviewed on Jul 14,2022Range was six miles. high power radio, long range, Haven't used them in a building yet.frank cunliffelong range radioReviewed on Jul 14,2022We used these radios while on trail work teams. So far they have reliably worked at 3+ miles in the mountains and 5+ miles in flat areas.they are long range radioPaul Wolfgood clearReviewed on Jul 14,2022These are amazing! Used at the lake and one person was at the cabin on top of a huge hill a mile long, and one was in the middle of the lake and they have good clearMike Slong range radioReviewed on Jul 14,2022I tried several different radios including the GMRS type. Just never could get any good range. Don't know how they can advertise a 30 or 40-mile range when everybody knows it ain't true! Decided on these radios and after testing I am very happy. I bought and used the long 18" antennas in order to increase the range and to conduct the range test. Ultimately I could get very good reception range of 3.5 miles with the power setting on 10 watts. This test was conducted across town with one radio stationary and located in a neighborhood that is about 50' below the level of the other radio. Basically one of the radios was in a deep hole which would kill the range of most radios. At 3.5 miles I was really shocked that I still had a good solid connection. I would have been happy with a range of 1.5 miles. The range did suffer some when transmitting from inside a vehicle. But even then I got over 1 mile.john gulleygreat radioReviewed on Jul 14,2022Was not able to get the software or drivers to run on Windows 10. Without being able to program these they are useless on my jobsites.but the RETEVIs RT81P is the great radio ,i think the good function is the ip67 waterproof function ,because i usually go to the outdoor,and challenge the water adventure activities.Wayne Coopergreat radioReviewed on Jul 14,2022I am impressed by the power these radios have. I used the in a 20 story building and the reception was crystal clear. I had one battery that was not holding a charge, but retevis was quick to replace. The only thing that could be improved would be the speaker volume. In a noisier environment it may be helpful to get a mic. Overall a great radio
Support
Firmware/Software
- RT81-UHF-Software-v1.05
- win11-DriverInstaller
The win11 driver is compatible with win10, win8 and win7 systems.