Fangrui Product Details Features:1. Wireless Lavalier Microphone, Wireless Live Broadcast/karaoke/outdoor, Ultra-clear Radio + Intelligent Noise Reduction + Reverberation Effects + Real-time Monitoring + Bluetooth Accompaniment 2. 2.4g True Wireless Technology, High-quality And Stable Radio 3.360 Omnidirectional Sound, Nearly Zero Delay In Live Recording, Allowing Video/live Broadcast To Enjoy Wireless Freedom 4. Noise Reduction Chip, Dual-mic Hybrid Noise Reduction 5. Built-in Reverberation Effects Create A Three-dimensional Sense Of Space And An Immersive Sense Of Presence The Picture Is A High-definition Rendering. There May Be Color Difference After Receiving It, Which Does Not Affect The Actual Use. Description: 1. Transmission Protocol: 2.4g Private Protocol 2. Bluetooth Protocol: Supports Bt5.3 3. Transmission Distance: 220 Meters 4. Charging Time: 1.5h 5. Adapter:5v/1a 6. Working Hours: 6-8h 7. Sampling Rate: 48khz 8. Battery Capacity: 300mah 9. Working Temperature:-10c-50c Material: Abs Colour: As Shown Package