Description: LOUDER VOLUME & MORE BASS: Distortion-free at maximum volume; room filling sound, perfect for home, dorm room, kitchen, bathroom, car, parties; streaming music or internet radio services. BROAD COMPATABILITY: Easy Bluetooth connection works with all Bluetooth-enabled devices: smart phones, pads, laptops and desktops, MP3 & DVD players, etc. WIRELESS FREEDOM: Built-in mic supports hands-free phone calls & outstanding bluetooth connection range of up to 33 feet for convenient wireless freedom. ENHANCED AUDIO: A CSR 3.0 Bluetooth chipset, 3W rate power and enhanced bass resonator offer class-leading performance for crystal clear and incredible sound quality. CONVENIENT: Bluetooth handsfree, works with the Bluetooth for wireless communication, Insert the TF card, Receive calls, With FM radio function. 1. Listening HD sound. 2. Support Bluetooth pairing, Computer microphone call function, and USB charging. 3. Excellent sound, Flexible and versatile. Speaker and speakerphone function is convient. Specification Bluetooth wireless effective range: 33 feet (10 meters) Bluetooth Version: 3.0 Bluetooth solution, support A2DP AVRCP protocol Battery capacity: 520 mA Working time: 5 hours or more Transmission distance: 10 m theory, the actual general 15 meters Dimensions: 60 mm (diameter) x 50 mm (H) Charging method: MINI USB 5V Charging time: Depending on the input power is different, generally 1-3 hours Speaker power: 45mm 4Ω 3W Frequency Response: 280Hz-16KHz Net weight: 230 g SNR:> = 95dB Distortion: <= 5%