Features: 1. [360 ° High Sensitivity Pickup Mic Head] Adopting a high-end microphone head, the 360 ° omnidirectional sound receiving sensitivity is high, with strong noise resistance and high fidelity in vocal recording 2. [2.4GHz Wireless Transmission] 2.4GHz is the wireless Bluetooth digital sampling frequency band, which has the characteristics of stable transmission, long receiving distance, strong noise reduction and anti-interference ability 3. [Long distance transmission] Unrestricted distance, within an effective distance of 60 meters, wireless amplification is possible 4. [Adjustable output amplitude] The receiver is equipped with two levels of output amplitude adjustment (single press the power button to switch), which better matches the use of different amplifiers, and the voice is clearer without whistling 5. [Charging while working] The receiver is paired with a Type-C fast charging interface, and can be used after charging for 1 hour Specifications: Battery capacity: 55mAh Transmission distance: approximately 60m Working frequency: 2.4 G Hz Transmission protocol: Bluetooth 5.2 Sensitivity: -38dB Battery life: 4 hours Charging time: approximately 1 hour Interface: 3.5 pin interface Packaging list: One to one: 1 * microphone+1 * receiver+1 * charging cable One to two: 2 * microphone+1 * receiver+1 * charging cable