Real time ear feedback monitoring: The fransmitter can be connected to headphones for monitoring, allowing for a more perfect sound recording effect while listening Long battery life: Paired with a charging case, the comprehensive endurance can reach 40 hours, and the single microphone can reach 10 hours Recording without power outage: The receiver is equipped with a direct charging interface for phone charging while recording Back clip design: The back clip design, combined with magnetic suction accessories, makes installation very flexible Upgrade noise reduction: Upgrade low cut+ENC environment noise reduction accurately reduce noise of different frequencies, and preserve the original texture of human voice Specifications: Material: ABS Input voltage: 5V Battery capacity: 70mAh Charging case battery: 600mAh Signal-to-noise ratio: 64DBM Adaptive noise reduction Transmission delay: 30MS Sensitivity: -42DB Frequency response range: 20-20KHZ Transmission distance: barrier-free 20 meters Transmisson technology: 2.4G wireless technology