TBMax M7 Bluetooth Wireless Speaker Super Bass, Portable Bluetooth Speaker Speakerphone - Crystal Clear Sound. Built-in MIC, Support Music: Blue tooth/LINE-IN(aux)/TF(micro SD Card) - Black ENHANCED AUDIO: A CSR 4.0 Bluetooth chipset, 3W rate power and enhanced bass resonator offer class-leading performance for crystal clear and incredible sound quality. COMPACT AND PORTABLE: Small size with carrying pouch. Anti-skid mat on bottom of the speaker to add stability; Multi-hole silicone protective layer to avoid slipping and spread the sound barrier-free; built-in hands free function anwser your call without delay,built-in TF card slot support MP3 music play built-in rechargable li-ion battery, up to 5 hours playing time depend on the volume,500 recycle charging 3W speaker with enhanced bass, 40mm speaker driver,offers high quality sound from its tiny body BROAD COMPATABILITY: Easy Bluetooth connection works with all Bluetooth-enabled devices: smart phones, pads, laptops and desktops, MP3 & DVD players, etc.; 3.5mm audio jack for non-Bluetooth devices.