Display song playback time and audio channel. Mini and compact, easy to carry. Enjoying the subwoofer stereo music. Support memory card or USB disk music play. With telescopic antenna, you can receive the FM radio. Type: Mini Speaker Material: Plastic + Alloy Storage Media: Micro SD/TF Memory Card Supporting Fat16/Fat32 File System Functions: TF Card, U Disk, FM Radio (Memory Card & U Disk Not Included) Music Format: MP3 Headphone Jack: Support Headphone Output Power DC 5V USB Power Adapter or Computer USB Charging Battery: 600mA Lithium Battery (Included) Endurance: 2-5 Hours, Actual Playback Time Depends on Volume Frequency Response Range: 150-18000Hz (±3dB) Signal to Noise Ratio: >85dB Output Power: RMS 3W x 2 THD=10% Features: Mini, Portable, with Antenna, Subwoofer Size: 50mm x 48mm x 52mm/1.97"; x 1.89"; x 2.05"; (Approx.) Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Mini Speaker 1 x 3.5mm Audio Cable 1 x Charge Cable 1 x User Manual