1、Engineering level housing, fastening and hard working, comfortable feel, not easy to wear, effectively protect the internal components. Smart compatible with a variety of devices connected hot shoe, back with 1/4in screw holes. 2、High frequency UHF dual channel wireless reception, which can be connected to two transmitters at the same time. It has stronger anti interference ability than ordinary 4G low frequency. It can be connected to headphones to monitor the recording effect in real time. 3、100m wireless transmission, wide range, strong anti noise, greatly reduce noise. The comfortable collar clip is carried with you, and the humanized design of the comfortable collar clip frees your hands from now on. 4、HiFi microphone head, with high density anti spray sponge, 360° omnidirectional radio, with the ability to correct the voice curve, the sound is clearer and more appealing. The internal high sensitivity original sound recognition chip can effectively reduce the current noise, the human voice is clean and clear, and it can prevent accidents in emergencies. 5、Responding to various situations, turn off Kemai with one button to stop recording. The internal lithium battery has long lasting battery life, continuous work without power, and the long lasting battery life can be up to more than 20 hours, eliminating the trouble of power failure when going out. 1 x Receiver2 x Transmitter1 x Storage Bag1 x Three Pin Interface Cable1 x 3.5mm Universal Interface Cable1 x Mobile Phone Conversion Cable2 x Clipper Microphone4 x Windproof Cotton1 x Hot Shoe1 x Manual Item Type: Wireless MicrophoneMaterial: PlasticColor: GreyWeight: Approx.953g/ 33.6ozModel: TX1+TX1+RX1Number of Channels: 50Modulation Method: F3EWireless Frequency Response: 565- 569.2MHZAudio Frequency Response: 30Hz-15KHzWireless Transmission Rate: ≤10mWFrequency Control: PLL SynthesizerSignal to Noise Ratio: >90dBPower Supply: Built-in Lithium Battery (1850mah)Battery Life: ≥20 HoursMicrophone Specifications: Capacitive OmnidirectionalWorking Temperature: 0℃-55℃Storage Temperature: -0℃-+55℃Transmission Range: Approx. 100m/ 328.1ft (Barrier Free)Applicable Models: Mobile Phones, Cameras