Very small,convenient to carry, plug and play,Very easy to use,and no need to install any driver.The Voice Changer has 8 different sound changes,Man to woman,Woman to man,Little girl, Baby, Magic voice, Deep voice,Optimus Prime,Original sound mode.The interface of this voice changer is 3.5mm type; it is ok to use an audio conversion cable with a 3.5mm interface. It can be used directly on your favorite headphones, headsets.It can be used on any mobile phone,computer,for tablet iPad,PS4 game console,XBOX game console, and any game platform.The voice changer is used for making calls and entertainment with friends,voice change of online games, etc. It is a must-have device.Type:voice changerSignal to noise ratio: 106dBDynamic range: 106dBBattery capacity: 300mA/ 3.7VCharging input: DV5V/1ABattery energy: 3.7whBattery efficiency: full power about 3-4 hoursFeatures: Voice Changer AdapterSize:75*50mm/ 3.0* 2.0 inchMaterial:ABSColor:blackPackage Contents:1 * Voice Changer1 * use manual1 * One audio cable1 * USB charging cable1 * Iron boxOnly the above package content, other products are not included.Note: Light shooting 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.