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. 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 Set: 1 to 2 Material: plastic colour: black Package Contents: 1 x Wireless Microphone set 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.