BOOMER VIVI Ultra-mini Wireless Bluetooth Speaker Loud and Clear Sound Long Playtime With Micro SD Card/USB Reader /AUX /FM Radio Portable Loud Super Bass For iPhone7 7S 6 6s Plus Samsung Laptop (Red) ENHANCED BASS: Implemented with 3W total acoustic drivers and ultra-small size produce a wide audio spectrum. Highly quality speaker inside could provide strong bass without distortion even at highest volume. ULTRA-COMPACT:Ultra Mini Size with the novel model.Anti-skid mat on bottom of the speaker to add stability.Aluminum appearance keep stunning outlook and attractive for music lover.You can put it directly in your pocket when go out. WIRELESS: Built-in memory chip for breakpoints playback function.Built-in mic supports hands-free phone calls & outstanding bluetooth connection range of up to 33 feet( Barrier free)for convenient. LONG PLAYING TIME : Built-in 680mA Rechargeable Battery for up to 5 hours playtime. 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.