Sentinel Wireless Entertainment Karaoke Speaker is designed for immersive audio experiences anywhere. Specifications: Wireless Version: V5.0+EDR Working Distance: 10 Meters Track system： 1.1; TYP：-80dBm; Speaker Type:1*5.25 inches 4Ω15W Sackbut,2*40mm 8Ω 5W tweeter; Max Power： 25W（ 2*5W+15W）; Power Amplifier Type： Class-G S/N:≥85db; Frequency Response: 100Hz～ 20K Hz Speaker Battery: 4800mAh 17.76Wh Mic Battery: 1200mAh; Music time: 8-10H Mic Using Time: 64H; Charging time： Speaker 6H Mic: 2-3H