Professional-level noise-reduction pickup: Equipped with a Digital Signal Processing (DSP) noise-reduction chip and high-density pickup technology. Even in noisy environments, it can output pure human voices with amazing effect. The sound is clear, accurate, and natural. It can accurately reduce noises of different frequencies while retaining the original texture of human voices. Intelligent Noise Reduction Ultra-Clear Radio Reception Plug And Play Lightweight Design: It doesn't press on the collar when worn. Adopting a magnetic button design, it innovates on the basis of retaining the traditional clip-wearing method. It is not restricted by position, and is more convenient, comfortable, flexible, and free to use. It can also be easily matched with various devices. ● Product Name: Lavalier Microphone ● Bluetooth Protocol: 2.4GHz ● Charging Time: 1.5 hours ● Single Battery Life: 10 hours ● Composite Battery Life: 40 hours Color: As Shown Material: plastic Package Contents: 1*Receiver 1*Transmitter 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.