1. Digital MP3 player: support U disk, TF card, no need to switch, automatically read audio files and play after inserting TF card/U disk 2. Built-in rechargeable lithium battery, can be used after charging 3. Using 3W*1 speakers, combined with scientific acoustic structure design 4. Adopt enhanced digital power amplifier IC, low power consumption, , strong, loud and clear sound 5. Multi-button control: volume, mode, etc. can be adjusted individually Support bluetooth connection to , you can control the file up/down, volume and volume in the music player by the speaker, and you can transmit the sound when playing games and watching Charging voltage: DC 5V/500mAh-1000mAh FM frequency range: 87.5-108MHz Amplification frequency: 150~18000Hz (+-3dB) Speaker power: 3W*1 Battery: Built-in battery (rechargeable) 300mAh Product size: 118 x 78 x 39mm Control : button / bluetooth Audio Crossover: Full-Range Speaker Type: Portable Channels: 3 (2.1) Bluetooth Version: 4.1 Playback Function: mp3,Radio Support Memory Card: Yes color:Gray Material:Plastic + cloth mesh Package Contents: 1 x Bluetooth speaker 1 x charging cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.