LUXA2 Groovy Duo speakers:Luxa2 Groovy Duo mixes hi-tech with hi-fashionistic appeal that ultimately connects you and all your audio experiences. The dynamic dual pairing mode of the Groovy Duo and increase your audio output from 3Watts to 6Watts for instant mono to stereo play. Capacity: 900mAh / 3.7V Li-Polymer Input: 5V0.3A Micro USBAudio output: 3W+3W(RMS)Playing Time: Up to 8~10 hours Charging time: 3 hrs Connectivity: Bluetooth CSR V2.1+EDR; A2DP (Audio Sink only), AVRCP (Remote Control only)Wireless range: 10meters/33ft (open area)Warranty: 1 year