Bluetooth® Version: 5.3\r\n Range: 10m\r\n Chipset: JL AC6966B\r\n Bluetooth Profiles: A2DP/AVRCP/HFP\r\n Battery Capacity: 5400 mAh\r\n Charge Input: 9V, 1.5A\r\n Charging Time: 5 - 6 Hours\r\n Play Time at 50% volume 6 - 8 Hours\r\n Play Time at 100% volume 2.5 - 3 Hours\r\n Frequency Response: 65 Hz - 20 kHz\r\n Sensitivity: 56dB\r\n Signal to Noise Ratio: 79dB\r\n Total Power Output: 40W RMS\r\n Max Size for Flash USB input: 128 GB\r\n Max Size for SD Card: 128 GB\r\n Impedance: 10O