84 Channels The CVM-WM300 wireless lapel microphone gives you a choice of 84 wireless channels. You just need to switch to the unrequested channel, there wouldn't be much frequency interference. Easy to Charge UHF rechargeable microphone system built-in rechargeable lithium battery, working time up to 10 hours and MICRO USB interface at the bottom, very convenient to charge. Real-time Monitor With the real-time monitor function, you can check whether it works normally while recording. CVM-WM300 omnidirectional lavalier microphone brings you more professional and convenient recording. Long Working Distance COMICA CVM-WM300's working distance is up to 394 feet (open area 394 feet, obstacle area 263 feet), adjust RF signal strength according to working distance, improving the quality of audio recording. ideal for capturing audio in a large scene. Lattice LCD Screen, High Resolution CVM-WM300 wireless microphone adopts LCD screen for manufacturing, all the font and icon on the screen are perfectly clear with wide viewing angle . Additionally, you can control the battery level and volume using the on-screen settings. What you need to note when using COMICA CVM-WM300A Wireless Lavalier Microphone: 1.When using automatic infrared synchronization, please stay within 1 meter, otherwise the signal may be too weak and the synchronization will not be successful; 2.In the case of stereo / mono mode switch , please preset the mode before using to avoid transient interference caused by switching during use; 3.For smart phone shooting, customers need to purchase TRS-TRRS audio converter cable separately; (It does not support the original recording system of some Android systems, it is recommended to use the third-party application in this case); 4. The antenna will affect the working distance. Please protect the antenna and avoid man-made damage; 5. When using this product for a short distance, it is recommended to set the RF power to \ "LOW \" to reduce power consumption; 6.Do not expose the device to rain or damp environment, otherwise there will be a risk of short circuit.