Cause Analysis：1、Whether the volume is on；2、Volume on。

Solution：1、Speaker problem；2、Replace speakers。

Cause Analysis：1、Whether the power switch is on；2、Whether the battery is in good contact；3、The battery is dead or the battery is faulty。

Solution：1、Try to reboot；2、Reinstall or clean contact points；3、Turn on after charging or replace with new batteries。

Cause Analysis：1、Whether to boot；2、Poor contact of LCD cable。

Solution：1、restart；2、Reinstall the LCD cable。

Cause Analysis：1、Whether the speech hole is clogged with foreign objects；2、Microphone issue。

Solution：1、Clean：2、Replace the microphone。

Cause Analysis：1、Operator signal is poor；2、Poor antenna contact or antenna failure

Solution：1、Telephone consultation with local operators；2、Retighten the antenna or replace it with a new one

Cause Analysis：1、Small headphones；2、Audio amplifier line is broken。

Solution：1、replace；2、replace。

Cause Analysis：1、Power tube。

Solution：1、Check the emission current：2、Replace the power tube。

Cause Analysis：1、connection signal interrupted；2、No local 2/3 / 4G network。

Solution：1、restart；2、Please contact your local operator。

Cause Analysis：1、The password and account number written into the machine do not correspond to the platform。

Solution：1、Check if the account and password on the platform are set correctly；2、After rewriting the machine account and password, reset it on the platform。

Cause Analysis：1、The users local mobile signal may be weak；2、Possible SIM card problem；3、confirm that the platform, SIM card, and radio are normal, there is a problem。

Solution：1、radio set single 4G signal: when E-net is displayed on the machine, please switch to single 4G mode；2、Report the card number to the company, and it can be processed in about 10 minutes (can be verified by yourself first: compare the mobile card that can be used normally by inserting it into a public network radio and verify it；3、Patches need to be added: specific method: please contact the company, the company will arrange personnel to carry the upgrade remotely, the operation is very simple. (Due to the upgrade of the mobile base station, there is a mismatch between the radio and the base station in some regions, and compatibility is required, so the radio needs to be patched)。

Cause Analysis：1、switch；2、Voltage regulator；3、The battery is dead or the battery is faulty。

Solution：1、Check whether the switch is damaged or the line is broken；2、Voltage；3、Turn on after charging or replace with new batteries。

Cause Analysis：1、Whether to boot；2、Poor contact of LCD cable。

Solution：1、restart；2、Reinstall the LCD cable。

Cause Analysis：1、Whether the speech hole is clogged with foreign objects；2、Microphone issue。

Solution：1、Microphone, 1846 integrated, big headset：2、Replace Microphone, 1846 integrated, big headset。

Cause Analysis：1、Antenna；2、Integration R24 integration。

Solution：1、Replace antenna：2、Replace components。

Cause Analysis：1、NA009；2、Software settings。

Solution：1、Replace NA009：2、Check whether the software setting has the function of turning on voice。

PoC radio

The professional POC walkie-talkie supports 4G / 3G / 2G full network communication, with nationwide unlimited communication distance. Rich functional services can meet customers widest intercom needs, and help customers efficiently complete management and scheduling work. Long-distance calling and multimedia functions make communication more efficient and convenient.

Didital radio
The digital walkie-talkie is designed with digital technology, digitizes the voice signal, uses a specific digital coding method and a specific base band modulation form, and uses a digital signal processor to optimize the data communication mode.
Digital walkie-talkies can use flexible packet communication and more functions, double saving radio spectrum resources, and can also provide better data processing and interface functions, and the voice is clearer and confidential.

Analog radio

Including amateur and professional walkie-talkies, the use of professional walkie-talkies is generally used in the professional business field. Therefore, the requirements of professional walkie-talkies are relatively simple and practical in function settings. The call and stability are strong, and frequency modulation and frequency setting should be performed through professional frequency program software. Amateur walkie-talkies are specially designed and manufactured to meet the needs of radio enthusiasts. Amateur walkie-talkies are more distinctive in function and appearance, and are the first choice for outdoor travel.

Precautions for battery use
1. Please select the original battery.
2. Do not modify or disassemble the battery, and do not touch the liquid.
3. If the metal conductor touches the bare electrode of the battery, the battery may cause damage or personal injury. Please store the battery properly. If it is worn on the body, avoid contact with wallets or other metal clothing.

4. To charge the battery when it is low, it should be performed in a 5 to 35 degree environment.

Precautions for using antenna
1. When using, do not carry the antenna or bend the antenna.
2. The radio should ensure that the antenna is installed in place when transmitting, otherwise it will easily damage the power tube.

3. Do not use damaged antennas.

Notes on the use of the charger
1. Internal components cant withstand beating. In particular, to prevent falling from a high place during use, do not throw, knock or vibrate the charger. Rough treatment of the charger will destroy the internal circuit board and cause malfunction
2. Dont put the charger in a place where the temperature is too high
3. Pay attention to check the voltage range of the charger, and the power supply should be adapted to it.

The antenna is an indispensable accessory of the radio, which is related to the quality of the call. NUT teaches you how to use and maintain it properly.
1. Be sure to install the antenna before starting the radio or when launching the radio, otherwise the power tube may be damaged.
2. The way of holding the walkie-talkie in hand is not recommended for "portable antenna". The internal structure of the antenna is relatively complicated, and the portable antenna is likely to cause damage to the internal structure.
3. The original antenna of the walkie-talkie is the best choice. Try not to change the antenna style at will.