Feature: 1. Chips used by audio and audio devices have their own low-power alert and low-power shutdown functions. 2. The structure adopts high-strength ABS, which is beautiful and practical. 3. More wear-resistant, u-band frequency penetration is stronger, more stable, and the sound is pure. Description: Product Name: Wireless Headphone Microphone Working time Charging time: 2h Bluetooth-compatible version: 5.0 Transmission distance: 10m Microphone head sensitivity: 53+-1 Microphone sampling rate: 48K 2.4G wireless microphone is suitable for: teaching, sound reinforcement, stage performance, head wearing, teacher lectures, Bluetooth-compatible audio, mobile phone and computer Packing list: Package A: microphone x 1, receiver x 1, adapter x 1 or Package B: microphone x 2, receiver x 1, adapter x 1 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.