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 changer Signal to noise ratio: 106dB Dynamic range: 106dB Battery capacity: 300mA/3.7V Charging input: DV5V/1A Battery energy: 3.7wh Battery efficiency: full power about 3-4 hours Features: Voice Changer Adapter Size:75*50mm/3.0*2.0 inch Material:ABS Color:black Package Contents: 1 * Voice Changer 1 * use manual 1 * One audio cable 1 * USB charging cable 1 * Iron box Only 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.