Features 1.2.4G Wireless: This Erhu microphone adopts 2.4G wireless frequency and anti interference technology to ensure stable audio transmission without delay. 2.Plug and Play: This violin microphone pickup adopts the latest frequency hopping technology, and frequency pair is not required, support automatic connection, plug and play. 3.Noise Reduction: This contact microphone pickup is designed with inbuilt chip that provides powerful noise reduction, effectively filtering unnecessary noise, provide pure sound quality. 4.3.5mm to 6.35mm Adapter: This Erhu pickup comes with 3.5mm to 6.35mm adapter, which is suitable for all kinds of audio equipments, providing easy and flexible connection. 5.Durable Material: This acoustic guitar pickup adopts strong and durable ABS material. Easy to install, use and detach, offering great convenience. specificationItem Type: Erhu Microphone Material: ABS Battery Type: Lithium Battery Receiver Battery Capacity: 400mAh (Battery Included) Transmitter Battery Capacity: 400mAh (Battery Included) Transmission Frequency: 2400Hz Audio Response: 20 to 20KHz Audio Signal: Digital Sampling, Mixed Output Power Consumption: 35mA Charging Time: About 1.5 Hours Usage Time: About 12 Hours Applicable Equipment: Erhu PackageList1 x ErhuMicrophone 1 x Receiver 1 x Head Wearing Holder 1 x User Manual 1 x 1 to 2 Charging Cable 1 x 3.5mm to 6.35mm Adapter 1 x Band 1 x Clip