Features Working distance up to 50m in area with obstacle30 channels optional convenient for multiple devices working together without interference from other channel signalsReal time monitoring can monitor the recording effect in real time and make it easy to adjustLattice LED with high resolution low power display will hardly affect the whole standby time the icon and font on the screen are concise and clear can real time understanding equipment operation statusWith the built in lithium ion rechargeable battery the battery can last up to 6 hoursWe have a leather case for each device for your convenienceEach microphone has a screw hole that can be attached to the camera and tripod via our complimentary adapter Specifications Frequency response 30 Hz20 kHzMicrophone type Single directionChannels 30Frequency control PLL SynthesizeS N ratio 96 dBPower supply Built in lithium batteryOperating time 6 hoursOperating range 50 meters at outdoor open areaOperating temperature 20℃ to 80℃Storage temperature 20℃ to 40℃Dimensions 10 5 3cm308C weight 380g308C weight 500gPackage Included Model A 308C 1 x Transmitter1 x Receiver1 x Microphone2 x Charge Cable2 x AUX Cable1 x Windscreen1 x Clip2 x Mount1 x Cold Shoe MountModel B 308C 2 x Transmitter1 x Receiver2 x Microphone3 x Charge Cable2 x AUX Cable2 x Windscreen2 x Clip3 x Mount1 x Cold Shoe Mount