Mini FM Transmitter Wireless Mic Surveillan Arduino Module Adj 88-108MHz E67

Features:
Operating 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 --- 108MHz (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 * 1cm L*W