The CVM-WM300B is one of Comici's most advanced wireless systems. Made entirely of high-quality metal, the receiver, transmitter and handheld microphone are designed for professional sound recording in interviews and public appearances. Two antennas and several mounting options < p> The WM300-RX receiver has two antennas and several options for mounting the device, including on a camera, belt or on a tripod. The backlit LCD screen shows the user the most important information such as the battery status of the receiver and both transmitters, sound level and group / channel selection. You can select mono or stereo mode and assign a given transmitter to group A or B. The receiver has 96 channels for communication with transmitters and can be assigned manually or you can use the option of infrared scanning for the least disturbed channel. 16-step volume control The CVM-WM300C kit also includes 1 transmitter with a tie-clip microphone that records 360 sound. The transmitter has a 16-level volume control and the installed LCF low-pass filter reduces unnecessary sounds such as rumble or the noise of traffic. The devices are powered by built-in batteries with a capacity of 2000mHh that allow work up to 8 hours. It is possible to choose low or high transmitting power to adjust the power consumption to work on short (low consumption but the range will be about 30-60m) or long distances (high power consumption but the range can reach 120m). Built-in transmitter which guarantees reliable communication with the receiver The interviews are conducted with the WM300-HTX handheld microphone powered by two AA batteries. Made of metal, it has a built-in transmitter that guarantees reliable communication with the receiver. The microphone also has an LCF low-pass filter that can be activated with a dedicated switch. Everything fits into a tasteful little suitcase. Specifications: TX transmitter Channels: 96 Group A wireless frequency: 520,000MHz ~ 548,500MHz Group B wireless frequency: 550,000MHz ~ 578,500MHz Signal / Noise: & gt; 65dB Antenna: 1/4 wavelength wire antenna Transmit power: 10dbm / 15dbm Stray radiation: & lt; -60dBc Audio delay: & lt; 20ms Audio distortion: & lt; 0.5% Battery: 3.7V 2000mAh polymer lithium battery Dimensions: 84x63.5x23mm Operating temperature: 0 ~ 50 Storage temperature: -20 ~ 60 RX Receiver Channels: 96 Group A Wireless Frequency: 520,000MHz ~ 548,500MHz Group B Wireless Frequency : 550.000 MHz ~ 578.500 MHz Signal / Noise:> 65dB Antenna: 1/4 wavelength wire antenna Receiving power: -95dBm < / li> Security matched radiation: & lt; -60dBc Audio delay: & lt; 20ms Audio distortion: & lt; 0.5% Battery: 3 polymer lithium battery, 7V 2000mAh Dimensions: 84x63.5x23mm Operating temperature: 0 ~ 50 Storage temperature: -20 ~ 60