The kk4 vibration speaker also has the 360 degree omni directional hifi sound which takes the music everywhere this is currently only available in black features aluminium alloy body 35mm audio jack bluetooth hands free compatible with any games console with bluetooth functionality micro usb connection built in lithium ion battery 37v 1400mah 10w dc 50v output power playtime 2 3 hours charge time 2 3 hours power supply rechargeable lithium ion battery usb cable dc 5v adaptor blu