Bluetooth wireless portable speaker for smart phone and tablet1.Speaker: 3Wx1
2.Frequency response: 90Hz-20KHz
3.Sensitivity: 80db ± 2db
4.Speaker: Φ40mm/4Ω
5.Signal to Noise Ratio: 80dB
6.Distortion: 0.3%
7.Battery:Built-in 3.7V 200mA
8.Bluetooth: Bluetooth 2.0 + EDR specification and supports A2DP V1.2
9.wireless hand free compatible with all bluetooth device such as Mobile Phone, Laptop,PSP...
10.Play stereo musich from Bluetooth device
11.Micro SD support+Handfree micro built-in