Yunnan New Coordinate Technology Co., Ltd
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Beifeng BF-660 intercom
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Product details

Product Details
Professional FM intercom BF-660, another intelligent masterpiece of Beifeng intercom, with a slim and compact body and manually designed circular PTT buttons, providing comfortable touch and convenient operation. Using advanced ABS material, it has excellent overall protection, allowing you to handle changes calmly and confidently. The combination knob paired with a high lumen LED flashlight provides a rich communication experience, making it a classic hotel walkie talkie, supermarket walkie talkie, and entertainment walkie talkie.

Performance and advantages:
Professional FM intercom BF-660, another intelligent masterpiece of Beifeng intercom, with a slim and compact body and manually designed circular PTT buttons, providing comfortable touch and convenient operation. Using advanced ABS material, it has excellent overall protection, allowing you to handle changes calmly and confidently. The combination knob paired with a high lumen LED flashlight provides a rich communication experience, making it a valuable and classic hotel walkie talkie, supermarket walkie talkie, and entertainment walkie talkie.
Quiet noise level
The mute function is used to silence the speaker when you have no signal. When the mute is turned on, no background noise can be heard; When the mute is turned off, you will hear background noise from the speakers. The mute function can be set to levels 0-9. Level 0 will disable the mute function. The walkie talkie is set to level 3 by default when it leaves the factory.
scan
Used to monitor signals programmed on the walkie talkie channel. During scanning, the walkie talkie detects signals on various channels and only stays on the channels with signals. Unplanned channels are not scanned.
Busy Channel Lock (BCL)
Used to prevent interference from other radio stations using the same channel as the one you have chosen, keep the channel clean and free from interference.
Battery voltage detection
When the power of the walkie talkie is turned on, the walkie talkie automatically checks the battery voltage. When the voltage drops to about 3.3 volts, the LED indicator light flashes red and an alarm sound is heard, followed by an alarm every 10 seconds. At this time, transmission will not be possible. Please charge or replace the battery in a timely manner to avoid affecting your normal use.
listener
You can use the MONI key to monitor weak signals that are difficult to hear under normal reception conditions, and adjust the appropriate volume based on the size of the background noise when there is no signal on the channel you have selected.
Press and hold the MONI key to turn on the monitoring function, listen for background noise, and release the key to restore the receiving state.
Simulated Yayin CTCSS and Digital Yayin CDCSS
When the channel you choose is programmed with this feature, you will only be able to hear calls from the same signaling radio station, and all other calls will not be heard.
This feature can block unwanted calls. Although it seems to have its own dedicated channel when using QT/DQT, if other walkie talkies are set to the same frequency or code as yours, the station can still hear your call.
Optional CTCSS
Optional CDCSS

Voice control function VOX (requires headphones)
The VOX voice control function allows you to transmit without pressing the PTT button. When this function is activated, you can directly start the transmission operation through voice, and the transmission will automatically end after the voice stops.
Setting of wide/narrow frequency band
It has a wide/narrow frequency band selection function, which can be used to select broadband (25kHz) or narrowband (12.5kHz) according to the needs in the bandwidth settings through the frequency writing software
Timeout limiter
To prevent users from occupying a channel for too long. The transmission time limit can be set to 10-300 seconds. If you transmit continuously for more than 300 seconds, the walkie talkie will automatically stop transmitting and emit an alarm sound.
Beat frequency offset
Flashlight lighting

general part
frequency range UHF:400-470MHz
Number of channels 16
Channel spacing 25 KHz /12.5 KHz
Operating Temperature -20℃~+60℃
Antenna impedance 50Ω
power supply voltage DC3.7V(±20%)
battery 2000mAh
Frequency stability ≤±2.5 ppm
Overall dimensions 65.7(L)*33(W)*105(H)mm
weight 161.5g (including battery)
Launch section
RF output power ≤5W
modulation scheme 16K0F3E (wide)/8K50F3E (narrow)
Noise and harmonics ≤-36dBm
FM noise ≤-40dB
Audio distortion ≤5%
Adjacent channel power ≥ 65 dB (wide)/60 dB (narrow)
Modulation restrictions ≤ 5KHz (wide)/2.5KHz (narrow)
Receiving section
sensitivity ≤ 0.2 μ V (width)/0.25 μ V (narrow)
Neighborhood selectivity ≥ 60dB (wide)/55dB (narrow)
Intermodulation Rejection ≥ 60dB (wide)/55dB (narrow)
Stray immunity ≥ 60dB (wide)/55dB (narrow)
signal-to-noise ratio ≥ 45dB (wide)/40dB (narrow)
Audio output power 0.5W
Audio distortion ≤5%
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