Description: Name: Microphone Frequency range: 2.4GHz; Frequency response range: 20-30KHz; Transmission delay: 9Ms; Signal-to-noise ratio: 64db; Input voltage: DC4.8~5.4v; Charging current: about 65mA; Battery capacity: 80mAH; Working time: about 20H; Charging time: about 80min; Microphone: digital microphone; K11 wireless microphone product features: support charging while live broadcasting. Live streaming, short videos, interviews, and enhanced sound effects. 20 meters barrier-free reception; Packing list: 1/2 x microphone 1 x receiver 1 x USB cable 1 x instruction manual 1 x packing box Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.