Mini FM Transmitter Wireless Microphone Surveillance USB Interface just like the analog stick

just like the analog stick push button)

3V MCU and 5V chip

When the module is in working mode

Total number of input output pins : 9

characters or even images

Mini FM Transmitter Wireless Microphone Surveillance USB Interface just like the analog stickOperating Voltage: DC 2V 9V Current: 9mA (3V voltage Reference distance: open ground 100 meters, 10 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: 50 ohms Size: 2 cm