Speaker specifications Speaker impedance: 16 ohms Horn frequency response 20Hz ~ 20KHz Speaker rated power 3mw Speaker 1k sensitivity 98db Talk time (medium volume) 3h Music time (medium volume) 3.2h Standby time 120h Bluetooth chip BT5335 Bluetooth version 5.0 + edr Transmission distance (m) 7-10m 18-22 mA Input power: 93mW Headphone charging time 1h Headphone battery capacity 50 mAh Charging compartment battery capacity 350 mAh Cycle charge times 2 times Charging time outside charging compartment 1.2h Battery voltage 32-4.2v Lithium battery energy content (Watt hours) 0.203wh Packaging specifications 105 * 85 * 35mm Single product weight 35.6g Machine weight 70g Accessories Manual + data cable + earphone