Retevis RT81 is a long range DMR handheld radio. UHF two way radios are ideal for city use. This 6-pack radio bundle also includes a convenient six-way charger for efficient charging of multiple radios or batteries at the same time and a programming cable for easily setting functions.
This 6-pack with 6-way chargers is ideal for small, centrally managed groups. It is equipped with a six-way charger capable of charging up to six radios at the same time.
The six chargers are designed to facilitate team management and to avoid individual mistakes. When we centralize the management of the team's equipment, we can better realize the team cooperation and activities.
The maximum power can reach 10W, while the high-gain antenna can provide stronger signal transmission and penetration ability. This allows you to have higher-quality communication.
The sound quality of digital radio can be better compared to analog walkie-talkie to keep loud and clear and keep good sound quality until the end of the coverage area.
Secure communications are an essential requirement, especially for public safety applications. The RT81 is equipped with 10-bit key data encryption; RT81 DMR two way radio prevents eavesdropping and avoids interference to ensure secure communication.
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.
For security, it is necessary to communicate. The walkie-talkie supports individual and group calls with ID by setting the frequency, time slot, etc. to meet complex communication requirements.
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.
Digital radios offer many advantages, including: better voice quality; wider coverage; longer battery life and greater safety; in addition, they are often compatible with analog radios
All Call/Group Call
Allows you to talk to other people at the same time, even if they are not on the same channel
long run times are no problem; 15 hours in analog mode; 25 hours in digital mode. Out-of-the-box; 16 channels pre-programmed with CTCSS/DCS to minimize unnecessary transmissions.
Question 1: What is the range of Retevis RT81?
Answer 1: RT81 long range DMR radio can reach 3 miles under ideal conditions. But the actual range may be affected by factors like the terrain, obstacles, weather, etc.
Question 2: Is the encryption of RT81 compatible with other radios?
Answer 2: Besides RT81 DMR radio itself, RT81's encryption can also be compatible with the encryption of the old version RT50 Waterproof DMR Two Way Radio (10 keys).
Question 3: Can RT81 work with RT29?
Answer 3: Yes, RT81 DMR digital 2-way radio can work with the RT29 long range analog two way radio in the analog mode. If you want the RT81 to work with the RT29, please ensure they have the same frequency and CTCSS/DCS in the analog mode.
Question 4: What's the benefit of the Dual Time Slot?
Answer 4: RT81 handheld DMR radio supports the Dual Time Slot, which allows two signals to share the same channel at the same time. One on Time Slot 1 and one on Time Slot 2. They do not interfere with each other and improve frequency usage efficiency, which is especially important in areas with busy communications.
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 mode: 15 hours; Digital mode:25 hours |
Battery capacity | 2200mAh |
Weight (includes battery) | 9.32oz/264g |
Radio size (includes 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 |
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
This is my favorite handheld of any that I've worked with. It has been my daily driver since I bought it.
Easy to program, good sound quality, and good range. I hit a repeater 30 miles away.
On time delivery and product as described
This radio is an inexpensive way to get into DMR. Its easy to program and is very capable. Highly recommended.
100%satisfied with the product. Exactly as described and I did spec test the radio. It is up to spec as specified.
This radio is very sensitive and picks up well.
Was exactly what I was looking for. Thank you. Works perfect.
will go thru walls few hundred yards .
I'm impressed with this radio. I believe it will work well for my intended use
These radios work very well, and they are usable right out of the box. Programming software works perfectly.
For the price it’s a good little radio to have for your arsenal.
They appear to be built pretty well. I dropped mine from about 2’ onto the concrete without any damage. They battery life is very good as well. I pick it out the charger in the morning and it is on all day in scan mode until 10 at night and there’s plenty of battery life.
I loaded it up with repeater freqs and away I went. I live in San Diego and was easily able to hit a repeater on Mt. Santiago in Los Angeles. That was using the stock antenna. I can easily hit repeaters around San Diego as well.I was talking with another ham friend using simplex 20-30 miles away. I was on Mt. Soledad and he was at his house in Escondido. He too was on his newly acquired RT10 from his backyard. We were able to work each other using analog and DMR. The DMR sounded great as well.
I bought one of these a week ago. I was able to program it in the ham bands with ease using an old programming cable from another radio brand.It worked great.
100% in Ordnung
Purchased 6 handsets for digital ISM comms at work.Dmr range in flat urban terrain was 1.25 miles.
Great for the price. I have used them with a repeater to talk 40 miles, but the repeater is doing the work to make that contact. Direct from handheld to handheld, you will be lucky to get a mile.
A nice alternative HT when the FRS/GMRS band if swamped because of an ongoing event.
With the proper antennas, those handhelds work well over a mile on even terrain. The harmonic suppression is within the manufacturers specifications.
They work great, easy to program especially if you have done DMR radios.
Dmr program is easy and adds more secure conversations. I did program a few amateur ham freqs. for repeaters. Also can connect outside antenna, but at 1 watt keep coax 5foot or less.
My god this is a nice one. Simple but powerful. l got a set of walkie talkie l use it for wild camping. Quite a nice device.
radios are good we use in auto salvage yard, they work great on our 10 acre prorerty. They were clear as a bell.
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