TF Capacity: Max support 32GB (Not included) Powered By: 1 x AAA Battery (Not included) Screen Size: 30x8.5 mm Item Size: 95x25x16 mm Net Weight: 26g Type: MP3 Player Music Format: MP3 Port: USB 2.0 Port Audio Output: 3.5mm Instructions for use: Step 1: Install Micro-SD before using MP3 player, connect it to the USB interface of the computer, and wait for the driver to update automatically. Step 2: Format Micro-SD into FAT32 file system. Step 3: Store the MP3 file with the bit rate of 128kbps in the root directory of Micro-SD. Notice: Micro-SD should be formatted in FAT32 format. TF card is not included; you have to use your own one (max support 32GB). Please confirm there is no battery before plugging into the computer. Each MP3 screen has a protector film. Colour: Black Material: Plastic Package Contents: 1 x MP3 Player (without 1 x AAA battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.