Product Details: Brand: SIDANDE Models: MIC-31 (1T1R), MIC-32 (2T1R) Designed for real-time recording and monitoring, these devices come equipped with support for earphone real-time monitoring and playback. With a built-in chip, sound clarity is enhanced by effective noise reduction. Applications include vlog shooting, program recording, and outdoor sound pickup. Frequency range: 570-579.5MHz, 580-589.5MHz There are 20+20 channels available. The maximum distance of operation reaches up to 80 meters in open areas. Working Temperature: -20-55C Storage Temperature: -20-55C Transmitter: RF Power: Spurious Emission: Input Interface: 3.5mm Audio Interface Input Frequency: 20Hz-20KHz Power Supply: Built-in Lithium Battery (650mAh), lasts around 3-4 hours Product Weight: 62g Receiver: Output Interface: 6.5mm or 3.5mm Output Level: >-60dBV Frequency Response: 50Hz-16KHz Signal to Noise Ratio: >=82dB Power Supply: Built-in Lithium Battery (650mAh) Battery Life: 6-8 hours (1T1R), 3-4 hours (2T1R) Product Weight: 31.6g Lavalier Microphone: Sensor: Back Pole Electret Capacitor Pickup Mode: Omnidirectional Frequency Range: 0Hz-18KHz Signal to Noise Ratio: 74dB SPL Sensitivity: -30dB+/-3dB@1KHz Plug Specifications: 3.5mm Audio Cable Length: 1.2m Package Includes: 1T1R Type: 1 x Transmitter 1 x Receiver 1 x Lavalier Microphone 1 x Microphone Output Cable 1 x Charging Cable 1 x User Manual 1 x Storage Bag 2T1R Type: 2 x Transmitter 1 x Receiver 1 x Lavalier Microphone 1 x Microphone Output Cable 1 x Charging Cable 1 x User Manual 1 x Storage Bag Images: