kekinianSpeaker specification;- Support A2DP, AVRCP, headset, handsfree profile- Bluetooth version : V3.0- Working range : Up to 10 m- Working time : 5 hours- Dimension : 60x60x50mm- Net weight : 75 g- Speaker : 50mm- Loudspeaker Output : 3w- Frequency Response: 280 HZ-16KHz- Signal-to-Noise : >95dB- Distortion : 0 .5%- Battery Voltage/ Capacity: 520mAh- Battery Charging Voltage: 5V+0.5V- Battery Charge Time: 2hours