With ezcap231 cassette tape to MP3 converter, you can easily play old tape and convert your old tape to MP3 without computer, and it can automatic partition each songs of full one side of tape. you just need to plug a USB flash drive on then press "record" button, the device will convert all music on tape to your USB disc in MP3 format automatically. You can also playback on it, or put USB flash drive to other place (computer, portable speaker,etc.) to play the recorded music. Features Stand alone, no computer required. Automatic partition. With Playback, can check the recorded music on device. With Auto Reverse function. AA battery or USB power selections. Small size, can play, convert anywhere. Package Contents Main unit (ezcap231 cassette tape to mp3 converter) USB to 2.5mm cable (For USB Power) Earphone User Manual AA Batteries (Option) Specfication Converter format:MP3 Power supply:2*AA Battery, USB port power supply (5V DC adapter, USB from PC) Working Time:1 hour with 2*AA battery Audio Channel:Stereo L/R Bit Rate:128Kbps Dimensions:121(L)93(W)34(H)mm / 155g Weight:145g (without batteries)