3pcs DC 2V To 9V 88-108MHz FM Transmitter Wireless Microphone Surveillance Frequency Board Module

Description: Operating voltage: DC 2V-9V Current: 9mA 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: 50ohms Size: 2cm x 1cm L x W Package Included: 3 x 88-108MHz FM wireless microphone surveillance transmitter module