K63 2 in 1 Square Lavalier Wireless Microphone Live Audio Recording 1. 2.4G wireless technology with automatic frequency matching. 2. DSP intelligent noise reduction technology filters out background noise, resulting in clearer vocals. 3. High-quality condenser microphone with omnidirectional ultra-clear sound pickup. 4. Supports real-time monitoring, and timely adjustment of sound status to avoid live broadcast accidents. 5. With a built-in high-capacity lithium battery, it can record continuously for up to 8 hours. 6. The receiver is equipped with a Type-C port, so you can charge your phone and record simultaneously. 7. Lavalier design, compact and portable, perfect for outdoor live streaming. Specifications Solution: JL AD6976M4 Effective Distance: >=15 meters Transmitter Power Consumption (Video Mode): 25mA Transmitter Power Consumption (Bluetooth Mode): 30-40mA Receiver Power Consumption: 20mA Mic Sensitivity: -38dB Mic Signal-to-Noise Ratio: >=65dB Frequency Response: 20Hz-20kHz Battery: 300mAh Charging Time: 1.5-2 hours