TP-Link BS1001, Groovi Ripple Portable Bluetooth 4.0 Speaker. Bluetooth wireless range up to 20 meters. Max. power output 4W. Battery type lithium-ion polymer. Operating time Approx. 4 hours(Varies by volume level and audio content). Battery charge voltage 5V 500mA. Adjustable angle for better music experience. Dimension 103 x 94 x 37mm. Weight 175g.