Product Description: FM Frequency:87.5~108MHz Interface: USB 2.0/TF Slot/3.5mm/ Mini USB Power Supply:Built-in Rechargeable Battery Battery Capacity:350mAh LCD:1.0" LCD Display Screen Max Extended Capacity:32GB Memory Card Type:Micro SD / TF, U Disk Media Format:MP3 Total Power:3W Impedance:4ohms Signal to Noise Ratio(SNR):80dB Sensitivity:15dB +/- 3dB Channels:2 Size:5cm*5cm*5cm/1.97"*1.97"*1.97" Features: 1. Portable: the speaker's size is small, and it is easy to carry. 2. Mulit-functional: the speaker supports FM/Micro SD card/TF card/USB/3.5mm jack audio device. 3. Design: the metallic appearance is different and can show your unique taste of fashion. 4. Wide Application: it is compatible with all audio output devices with 3.5mm jack, such as mobile phone, MP3, MP4, Notebood PC and so on. 5. Several Power Supply Manners: battery, computer USB, adaptor DC5V. The use of the product has no limit which allow you to enjoy the music at any time and places. Package Include: 1 x Mini Speaker 1 x USB Cable 1 x 3.5mm Cable Notes: 1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors. 2. Due to the screen difference, the color may be a little difference from what you expect, please allow it 1. Portable: the speaker's size is small, and it is easy to carry. 2. Mulit-functional: the speaker supports FM/Micro SD card/TF card/USB/3.5mm jack audio device. 3. Design: the metallic appearance is different and can show your unique taste of fashion. 4. Wide Application: it is compatible with all audio output devices with 3.5mm jack, such as mobile phone, MP3, MP4, Notebood PC and so on. 5. Several Power Supply Manners: battery, computer USB, adaptor DC5V. The use of the product has no limit which allow you to enjoy the music at any time and places.