Wireless transmission:2.4GHz adaptive frequency modulation Point to: All directional frequency response range 20Hz-20KHz Charging time: TX: About 6h charging compartment: about 2.5 times to charge a transmitter Battery type: LIPo 15 Charging box: 85 x 35 x 50mm<br><br>Transmission distance: Recording (measured): Barrier-free 33 meters, back to 25 meters Broadcast(measured): Barrier-free 35 meters, back to 27 meters Material: ABS Color: As shown Specifications: 1 to 2 for ios<br><br>Package Contents: 1 x Microphone 2 x USB cables 1 x Chinese and English manual<br><br>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.