Hold the PTT button and V/M button to turn on your radio, the screen will display Factory, then you are in the full band now. Delete the channel parameters of the specified channel, if there is no CH- in front, it means that the channel has no parameters and the operation is invalid Retevis RA685 with the frequency range: 144-146MHZ(RX/TX) 430-440MHZ(RX/TX). The Analog mode Ham radio. In the frequency mode, press the [A/B] key to make the pointer point to A (upstream frequency point)

RA685 offers the full keypad, so you can program your RA685 by its keypad. Very easy and convenient to set your radios when you are out.The current transmitting power is high power (the longest communication distance, the largest power consumption); Analog sub-audio (CTCSS)/digital sub-audio (CDCSS) is mainly used to avoid listening to unrelated calls on the same frequency. If CTCSS/CDCSS is set, within the effective communication range, only calls with the same subtone signaling set in the channel can be received; but if CTCSS/CDCSS signaling is not set, you can listen to the effective communication range All calls on the same channel. In the standby mode, press the [MENU] key, the voice prompt "menu setting", enter the function menu setting; Please consult your local dealer for optional accessories of the walkie-talkie. Main Specifications TOTAL A/B upper and lower frequency band switch selection. Press the PTT button to transmit in the frequency band pointed to by the pointer.

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.

Brochures

Voice-activated transmission VOX After turning on the voice-activated, when the voice detected by the microphone meets the transmission conditions, the terminal will automatically transmit the voice, and you can speak directly without pressing the [PTT] key. The voice control gain is used to control the sensitivity of the microphone's voice control emission, which is configured by the dealer. The RA685 applied for certification for the European Enthusiast band, so it works in the European enthusiast band. Its frequency is: After releasing the PTT button, the machine sends a shutdown code to suppress the instantaneous noise of the listener Since the dual-standby dual-save mode is in the main and sub-channel scanning state, in the dual-segment dual-save mode, even if the power saving function of the unit is turned on, its power saving function is still invalid, and the standby time of the walkie-talkie will be shortened. Hold the PTT button and side key 2 when you turn on the radio. It will flash red and enter upgrading mode.

For example: RT27 uses RT27V programming software to write frequency, and RT27v uses RT27 software to write frequency, which will cause the walkie-talkie to freeze and the red light is always on. You need to re-install the program or change the chip for the walkie-talkie. Fiber networks operate in all kinds of environments. A data center is substantially different from an outdoor monitoring network, and neither has much in common with an industrial production facility. Frequency Seeking function. when other radio is transmitting, you can seeking its frequency and CTCSS/DCS. and save it. An emergency alarm is when you encounter an emergency, you can ask your companion or the control center for help.

Monitoring MONI monitoring is a listening method used to receive more signals or weak signals. It helps to distinguish and listen to the faint sounds in the speakers. Please note: Do not power off or stop the device during the upgrade. Otherwise, the chips may be burned out. How to use shortcut keys to switch between the amateur band and full band? Off: No function Flashlight function: Short press the [SK1] key to turn on the flashlight function and the flashlight light is always on; short press the [SK1] key again to turn off the flashlight function. If you choose to operate the flashlight function in the menu mode, short press the [SK1] key to turn on the flashlight for the first time, short press the second flashlight to keep flashing, and short press three times to turn off the flashlight. In frequency mode, the transmitting frequency is equal to the receiving frequency minus the frequency difference frequency