Bluetooth version V5.0 for the main control chip of the AC7006D8 300mAh is the battery's capacity. Working distance: roughly ten meters Music mode operation time: roughly 15 hours; horn diameter: 40M0M 114 soil horn sensitivity 3DB MIC: 4013-42DB electret Using USB Type-C to charge Time on standby: roughly 3500 hours Approximate charging time: 1.5 hours