Bluetooth:ATS 3015 V5.0 Effective Range:10-15m Frequency Response:20HZ-20KHZ Mic sensitivity:42dB Rated power:3mw Voltage:3.7V Impedance:32 ohm Speaker:10mm*2 Play time:5-6 hours Standby time:120 hours Charging time:1.5 hour Battery:40Mah x 2 earbuds, 500Mah x 1 case Charging port:Type C