Micro FM transmission module with a microphone black wireless frequency regulating module wireless microphone launcher wireless monitoring board

Features:

1. End with a microphone
2. Enter the microphone and audio sensitivity, and the transmission frequency is continuously adjusted.
3. Launch power: 5V input can reach 150mW transmitting power, empty 300 meters.
4. Full imported components, stable work, not drifting, and not drifting the antenna in your hands.
5. Broadband modulation, good sound quality, can be comparable to the sound quality of FM Broadcasting Station.

Product parameters:

【Dimensions】

2 cm * width 1cm * thickness 0.48cm

【Working voltage】

DC 2V --12V (A paragraph)
(It is recommended to supply power with a battery. There will be a communication sound of the voltage voltage power supply.

【Working current】

9mA（3V电压测试，超级省电，电压升高->电流增大->功率加大->The distance is farther,)

【Launch distance】

The open area is 100 meters (3V voltage test). The distance between the wall of the interior decreases, the distance between the wall of the reinforced concrete decreases significantly, and the increase in voltage can greatly increase the distance.

【Working frequency】

85MHz-115MHz (the default factory frequency is generally between 99.0-100.9 MHz)

【Receiving method】

Ordinary FM FM radio can be received, and mobile phones with FM function can also be received. Our store also has two receiving (FM radio) modules.The APP radio using network data traffic cannot be received.

【Frequency adjustment】

Micro -adjustable capacitance on the circuit board, twist with a small screw knife to adjust the frequency

[Output impedance] 50 ohm

【Sensitivity】

The microphone is placed in a quiet 15 -square -meter room, and the sound of the quartz clock acupuncture is clear and listening.

【Usage】

High -sensitivity wireless microphone, wireless recording, wireless monitoring, remote recording, maternal and infant care, patient care, etc.Because the sensitivity is too high, it is not suitable for stage performances, and it is prone to howling.
Do not use it for illegal eavesdropping!Concern!

[Working hours]
The working time of the module is determined by the battery capacity.In addition to the module working current with the battery capacity, the working currents of the five modules of our store A/B/C/E/F are different, and the pages are introduced.For example, when the A model works at 3V, the current is 9mA, so if you use a 3.7V, 900mAh lithium battery to power, the time to work is: 900 except 9 = 100 hours.