Bluetooth Wireless Portable Speaker for iPhone, iPod, iPad, Tablet, MP3 Players, Android smartphones [Gray] Powerful Sound. Portable Bluetooth Speaker with 3 Watts output Compatible with music devices, like smart phones, tablets, PCs, laptops and more. Also uses a standard 3.5mm jack for maximum compatibility Built-in microphone for hands-free speaker phone calling Rechargeable Li-Ion Battery for up to 8 hours of playtime Very Compact and Lightweight only 5 ounces