Clearer sound quality, Built-in DSP noise reduction chip. Plug and play. Reverberation function. External speaker function, with earphone monitoring. Made of high-quality materials. Battery capacity:50MAH lithium battery Battery life:4-5 hours Signal-to-noise ratio:64DBM Transmission delay:30MS Sensitivity:-42DB Frequency response range:20-20KHZ Transmission distance:barrier-free 20m-30m Type:B:for Apple interface Colour:Pink Material:ABS Package Contents: 1 * Wireless Lavalier Microphone Kit 1 * Multi-language instruction manual 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.