TF capacity: Max support 32G (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: USB2.0 port Audio output: 3.5mm User manual: Step 1: Install Micro-SD before using the MP3 player, connect it to the computer's USB interface and wait for the driver to update automatically. Step 2: Format the Micro-SD to FAT32 file system. Step 3: Store the MP3 file with a bit rate of 128kbps in the root directory of the Micro-SD. Note: Micro-SD should be formatted in FAT32 format. TF card is not included, you need to use your own (max support 32GB). Please confirm that there is no battery before connecting to the computer. Each MP3 screen has a protective film. Colour: Black Material: Plastic Package contents: 1 * MP3 player (without 1xAAA 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 a little different from the real thing. The measurement allowed error is +/- 1-3 cm.