Useful information about KreaFunk aCOUSTIC 20 hours of playback time (50% volume)Bluetooth 5.012W digital amplifier with with 360° advanced sound technologyCharging time: 5-6 hours (USB) / 8-9 hours (Qi)Pair two aCOUSTIC speakers for True Wireless Stereo (TWS)Works with Voice AssistantDust and water-resistant (IP55)Supports wireless Qi chargingIncluding USB to USB C charging cableDimensions: 75.5x161.5mm (ØxH)CE, FCC, RoHS, CCC, SRRC, WEEE