Line 6 BackTrack + Mic Guitar Riff Recorder Automatically capture musical ideas with Instant replay and review Up to 24 hours of audio capture with up to 24-bit/48 kHz album-quality audio Microphone with automatic gain control; 1/4-inch input; 1/4-inch output; 1/8-inch Easy .WAV file transfer to your computer via USB 2.0 for storage or further recording, editing or mixing argeable battery via USB; over 8 hours of battery life