The noise reduction function can be turned on/off freely to restore clean and pure sound quality 2.4GHz wireless transmission technology, low latency, more stable signal transmission Built-in high-quality omnidirectional microphone, providing users with broadcast-level sound quality Automatic pairing at startup, no code pairing required, plug and play Dual-channel design to meet various recording scenarios The transmitter can work continuously for 9 hours after being fully charged During recording, if your device needs to be charged, you can connect to this USB-C port to charge it Compatible with mobile phones, tablets, computers and other recording devices with USB-C interface Specifications: Transmission Type: 2.4GHz Directivity: Omnidirectional Frequency Response: 20Hz-16kHz SNR: 80dB Sensitivity: -42dB Transmission Range: 50m (without obstacle) RX Output Power: 6db TX Battery Capacity: 95mAh TX Charging Time: about 2 hours TX Battery Life: about 9 hours Receiver Power Supply Mode: external equipment power supply BY-V20-TX: 9.5g BY-V20-RX: 6g BY-V20-TX: 52.22x25.23x19.75mm BY-V20-RX: 43.92x24.7x9.3mm Package included: 2 x BY-V20-TX Transmitters 1 x BY-V20-RX Receiver 1 x USB-C Charging Cable 1 x Foam Windscreen 1 x English User Manual Other items not include