POLISH DISTRIBUTION BOYA BY-WM4 PRO-K2 SET OF TWO 2.4GHZ WIRELESS MICROPHONES FOR CAMERAS FOR SMARTPHONE MIRROR CAMERAS CASE \ n 2x Transmitter \ n 1x Receiver \ n Flash sled mount (hot shoe) \ n 2x Microphone foam cover \ n 2x Microphone mounting clip \ n 3.5mm JACK cable \ n Case \ n BOYA BY-WM4 PRO-K2 wireless microphone (microport) The microphone is designed for wireless cooperation with video cameras, SLR cameras and audio recorders. BOYA BY-WM4 is a new generation of microphones operating on the 2.4 GHz frequency. It allows you to record sound in a much higher quality than that built into the device. The device also allows for high mobility of the recorder thanks to a range of up to 25m and a very compact size. < / p> SPECIFICATION \ n operating frequency: 2.4GHz \ n Frequency response: 35Hz ~ 14kHz \ n sensitivity: - 30dB / - 1dB / 0dB = 1V / Pa, 1kHz \ n signal / noise ratio: & gt; 84 dB \ n powered by two AA batteries \ n dimensions of the transmitter and receiver: 47x70x23mm \ n JACK 3.5mm connector \ n range of 50 meters \ n receiver / transmitter weight: 152/136 g \ n "