Use 3gpConvert to batch converting video and audio file to 3GP and play it on your mobile phone or mp4 player. It have 4 key features: 1, The most easy to use. Simple click add file or directory and press start to convert it all,no hard settle, no bored parameters; 2, Faster than ever.Complete a converting in 3 minutes (source video length 50 minutes); 3,Hi-quality.It can get better result but less size than other Converters; 4, It support avi,wav,mpg,mp3,mov,amr,mp4.