Very small,convenient to carry, plug and play,Very easy to use,and no need to install any driver. Changer has 8 different sound changes,Man to woman,Woman to man,Little girl, Baby, voice, Deep voice, 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 , game console, game console, and any game platform. 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 * Only the above package content, other products are not included. Note: Light 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.