??? Speaker: 3Wx1
??? Frequency response: 90Hz-20KHz
??? Sensitivity: 80db ± 2db
??? Speaker: Φ40mm/4Ω
??? Signal to Noise Ratio: 80dB
??? Distortion: 0.3%
???  Battery: Built-in battery 3.7V 400mA
??? Bluetooth: Bluetooth 2.0 EDR specification and supports A2DPV1.2
??? wireless hand free compatible with all bluetooth device such asMobile Phone, Laptop,PSP...
??? Play stereo musich from Bluetooth device.
??? Handfree microphone built-in