Retevis RA685 Walkie Talkie Dual Band, Long Range Two Way Radio 5W High Power, Amateur Radio, Ham Radio 1800mAh Flashlight FM Rechargeable Walkie Talkie Handheld for Beginner, Hunting (Black, 1Pcs)

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The current transmitting power is high power (the longest communication distance, the largest power consumption); CHIRP is a free, open-source tool for programming your amateur radio. It supports a large number of manufacturers and models, as well as provides a way to interface with multiple data sources and formats. To get started: It also has the SOS emergency alert function, you can preset the sidekey to SOS function. when turn on the SOS, the 2 leds will flash green and red. According to the 2016 new requirements of the International Civil Aviation (IATA) "Technical Regulations for the Safe Air Transport of Dangerous Goods", the state of charge of lithium-ion batteries (cells) for air transport shall not exceed 30% of their rated capacity. Therefore, the first time the battery is used with the host, there will be a low battery warning with the voice prompt "please charge". Phenomenon, please charge the battery before use.

RA685 has a special function-frequency measurement, which can copy another radio’s frequencies and CTCSS/DCS. Press “*”key to enter the frequency measurement mode, press【▲】or【▼】key to select U segment or V segment. When the signal is reached, if the current frequency has CTCSS/DCS, it will be displayed on the screen. Press the key to save the current frequency. Or use the shortcut operation by pressing the pre-programmed side button. If you need to copy the frequency, just press “MENU”to copy successfully. To ensure effective frequency measurement, when using the frequency measurement function, please be within 1 meter from the transmitter. More Features of RA685: If you use unauthorized accessories without authorization, all consequences caused by this are the responsibility of the user. In frequency mode, the transmitting frequency is equal to the receiving frequency plus the frequency difference frequencyWe use the highest quality parts and manufacturing processes to ensure optimal performance. With a complete portfolio of Retevis Original and two-way radio batteries that have been designed and developed as an integral component of our two-way radios, you can be confident our radio batteries perform when you need them most.

Secondly, RA85 has a fixed antenna, the users cannot remove or change the antenna, but the users can remove and change the antenna by themselves on RA685. Button side tone + ID code side tone: When sending button side tone and ID code side tone, the machine emits the corresponding sound After scanning is turned on, the terminal will scan according to the scan list. When there is activity on a certain channel, it will stay on the channel to listen, so as to understand the current activity status of related group members.Channel mode to initiate a call: After selecting a channel, press and hold the [PTT] key to initiate a call to the current channel. Speak into the microphone in a normal tone. When a call is initiated, the red LED light is always on. Also, please perform a search through all open and closed issues. Maybe someone else had the same problem before, and a solution is already available. In frequency mode, the transmitting frequency is equal to the receiving frequency minus the frequency difference frequency When storing a channel, it is used to indicate the channel number to be stored. If the word CH- is displayed in front of the number, it means that the channel originally has channel parameters Direct selection of keyboard numbers for menu items, the transmit and receive frequency can be manually input

To consider the RA85, the RA685 has more choices, you can use it in many scenarios like ham activities, business use, outdoor activities, or even you can talk to your friends who live far away from you within 4.5 miles. The next difference is, the users can only apply for the license in the local ham club for the GMRS radios, it is not the same as the ham license, so you can only pay for the fees of GMRS frequency. But the ham radio is more complicated, you need to consult with the local ham club about the relevant knowledge of the license to apply. Timeout prohibition TOT timeout prohibition can limit the single transmission time (the default is 60 seconds) to prevent the communication parties from occupying channel resources for a long time, and to prevent the terminal from being damaged due to overheating. After the duration of pressing the [PTT] key expires, the terminal will automatically terminate the transmission and emit a warning tone. If you need to talk again, please transmit after the preset time. After the PTT is released, the machine does not send a shutdown code, usually when it is relayed through the relay, let it make noise to confirm whether the signal of the machine is relayed Repeat the above operation, select OFF to turn off the dual-frequency standby function. In the menu mode, the dual-frequency standby is temporarily turned off, and after exiting, the dual-frequency standby will be restored.

If your problem is about how to use CHIRP with an already supported radio, then you should ask that question in the mailing list. An emergency alarm is when you encounter an emergency, you can ask your companion or the control center for help. Direct selection of keyboard numbers for menu items, the transmit and receive frequency can be manually input. In frequency mode, there is no frequency difference between the transmitting frequency and the receiving frequency