Note: To save energy, the conversion circuit only works when a memory card is connected. Even without the memory card, you can still play the cassette. Specification: Item Type: Cassette Tape To MP3 Converter_x000D_Material: Plastic_x000D_Model: ezcap232_x000D_Converter Format: MP3_x000D_Power Supply: 2 x AA Batteries (not Included), Any USB Port Power Supply (5V DC Adapter, Computer USB Interface, Etc.)_x000D_Memory Card Format: Support FAT, FAT32, exFAT_x000D_Working Time: 2 Hours with 2 x AA Batteries_x000D_Sound Channel: Stereo L/R_x000D_Bit Rate: 128Kbps Features: 1Convert Tapes to MP3: Our unique cassette to MP3 converter captures sound from a memory card to quickly convert old tapes to MP3 format. 2Versatile: Portable cassette players work perfectly with any standard 3.5mm AUX jack, which means you can use the sound port for headphones, speakers, car speakers. 3Clear Sound Quality: The USB cassette to MP3 converter features stereo sound quality, so you can enjoy crystal clear sound quality for even the oldest bands. 4Simple to Use: Cassette to MP3 converter does not require a computer, can play on memory card, or just put the memory card elsewhere (computer, portable speakers or transfer to mobile phone, for iOS earbuds, etc.) to play recorded music. 5Complete Transfer Kit: USB cassette tape player comes with the converter instruction manual and power cable, headphones, making the transition quick and easy. PackageList: 1 x Cassette to MP3 Converter 1 x Headphone 1 x Power Cord 1 x Manual