Product parameters: wireless version v5.0 transmission distance:> 10m charging time: 3-4h play time: 5 hours (50%) volume standby time: 40h battery capacity: 1500mah core functions: 1 portable 2 connect two machines in parallel 3 long battery life 4 full-range speakers 5 national karaoke 6 support u disk 7 support tf card 8 support aux line