Memory card type: Micro SD/TF, U disk (not included) Maximum expansion capacity: 32GB Media format: MP3 Total power: 3W Impedance: 4ohms Signal to Noise Ratio (SNR): 80dB Sensitivity: 15dB +/- 3dB Channels: 2 Interface: USB 2.0 / TF slot / 3.5mm / Mini USB Radio: FM radio Power supply: built-in rechargeable battery Built-in battery: 600mAh Other features: 1.0" LCD display Certification: CE FM frequency: 87.5~108MHz Size: 5*5*5cm color: blue feature The sound quality is clear and the characters are scratch-resistant. FM function: Automatically search for radio stations. Micro SD/TF card slot design: directly insert the TF card to read data and store music files. Support U disk playback mode: automatically read audio files inserted into U disk or USB connected device. LCD Display: Display the working mode with a small LCD screen. LED indication: The blue light is on when the speaker is working. Compatible with all devices with a 3.5mm interface. Aluminum alloy shell, durable and stylish. Small size, various colors and beautiful appearance. Suitable for indoor and outdoor use. Package Contents: 1 mini speaker 1 x Power Cord 1 x Audio Cable