Wireless Lavalier BS-Q8 series is a mini 2.4Ghz wireless microphone system that provides high quality sound for live streaming , vlogging, course recording, and other audio capturing app lications. BS-Q8-A . is compatible with most, the BS-Q8-A is designed for iOS devices, and it comes with 2 transmitter and 1 receiver. BS-Q8-C . is compatible with most Android devices with USB-C ports, including smartphones and tablets. It has 2 transmitter and 1 receiver. BS-Q8-2. USB-C Including the 2 transmitters and 2 receiver, it can record two sound sources at the same time. Transmission distance: 10-30 meters Signal to noise ratio: 70dB Working current: 12mA Earphone monitoring: support Noise reduction: Supports three-level noise reduction Reverb: support Charging compartment battery: 300mA/H Frequency response: 20Hz-20KHz Adapters: 5V/1A Working temperature: -10C-50C Color: Black Material: ABS Package Contents: 1 * microphone set 1 * USB data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.