It is a mini FM Wireless Microphone Surveillance Frequency Board Module. Its frequency can be changed using a potentiometer. it is very compact and operates on a battery.
Electrical Characteristics:
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- Operating voltage: DC 2V-9V
- Current: 9mA
- Reference distance: open ground 100 meters 0-30 meters indoor environmental obstacles (3v voltage test, increasing the voltage from the greatly increased)
- Operating frequency: 85MHZ – 115MHZ (usually between 99-101 boot default frequency)
- Receive way: as long as the 88-108MHz FM radio can receive, with FM feature phones.
- Frequency adjustment: adjustable capacitor
- Output impedance: 50ohms
Mechanical Characteristics:
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- Size: 2cm x 1cm ( l x w)
Applications:
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- for Surveillance work
- as a hide microphones
Package includes:
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- 1 X Mini FM Transmitter Wireless Microphone Surveillance Frequency Board Module for Arduino Adjustable Capacitor DC 3V 9mA 88-115MHz
Thank you for perfect shipping .The product is also very well good quality I strongly recomend ifuture for any spares