Audio Recorder app is an excellent app to record audio in the background. That means you can run other apps when Audio Recorder is recording as a background service. The following is the feature list.1. Record the audio as a background service.1.1 Recorded audio files are stored in external storage (SD card). Default audio folder name is “LIDAR Audio Recorder”.1.2 Audio source is selectable. (DEFAULT, MIC, VOICE_UPLINK, VOICE_DOWNLINK, VOICE_CALL, CAMCODER, VOICE_RECOGNITION, VOICE_COMMUNICATION). You can choose the source for better audio quality.1.3 There are two ways to record directly from audio output in order to workaround the privacy limitation of the phone. a. Use hack app to get the root access right of the phone. b. Use the firmware with root access right of the phone.1.4 Audio format is selectable. (DEFAULT, THREE_GPP, MPEG_4, AMR_NB, AMR_WB)1.5 Audio encoder is selectable. (DEFAULT, AMR_NB, AMR_WB, AAC)1.6 Audio record length is selectable. (Unlimited, 10 minutes, 20 minutes, 30 minutes, 40 minutes, 50 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours) The default length is 1 hour.1.7 Run Audio Recorder app again can close the background service.2. Play recorded audio files.2.1 Choose from file list to play the recorded audio file.2.2 Choose from file list to delete the recorded audio file.For more information, please refer to http://www.leaderg.com/app/AudioRecorder.phpAudio Recorder app is the product of LEADERG Co., Ltd. If you have any question about this product, please send email to us. We will reply you as soon as possible.Thank you!