Brand N/A Quantity 1 Color Black + silver Material ABS Impedance 72dB Microphone Frequency Response 60Hz~13KHz Sensitivity 600 ohm Features SMD components and SMT technology with good quality and long operating distance (30~50 meters); Use shock solid frequency line with stable frequency less dead points; High anti-interference: Prevents the interference from computer DVD and Digital power amplifier; Prevent squeaking: Switch impulse noise cancelling circuit; High sensitivity voice high fidelity; wide frequency response and good tone quality; USB power supply instead of battery; Frequency range: 180~270 MHz; Frequency Stability: 50PPM(-10-35); Modulation mode: FM; Frequency response: 60Hz~13KHz; Operating distance: 30~50M; Working temperature: -10~35'C; Receiver: Receive mode: Super heterodyne; Receiving Sensitivity: >12Dbu(s/n=40Db); Power supply: 5V; Transmitter: Power supply: 9V battery; Operating currert: 30mA Others Suitable Family Karaoke computer Karaoke video chat product promotion outdoors lecture teaching military training tour guide exhibition and small promotional sites Packing List 1 x Microphone 1 x Receiver (95cm cable) 1 x 9V battery 1 x Chinese user manual