Marshmallow Wireless TWS Karaoke Speaker is designed for immersive audio experiences anywhere. Specifications: TWS; Wireless Version: V5.0+EDR Working Distance: 10 Meters Track system： 1.1; TYP：-80dBm; Speaker Type:77mm 4Ω8W Sackbut+33mm tweeter Max Power： 10W（ 8W+2W）; Power Amplifier Type： Class-F; S/N:≥85db; Frequency Response: 60～ 20K Hz Speaker Battery: 3.7V 2400mAh Mic Battery: 3.7V 500mah; Music time: 2-3H; Mic Using Time: 10-12H Charging time： Speaker 3H; Charging Input Criteria: Type-C USB， DC5V 1000mA