Bluetooth Speaker with Dual Wireless Microphones:Bluetooth Version: V5.3Power: 4, 10W x 2Speaker Size: 57mm x 2Signal-to-Noise Ratio: 115dBFrequency Response: 20Hz 20kHzTHD: <1%, 1kHzBuilt-in Battery: Speaker 3000mAh (3-5 hrs charge, 3-6 hrs working); Microphone 1200mAh (1-2 hrs charge, 5-8 hrs working)Dimensions: 240 x 87 x 120mmConnectivity: Bluetooth, USB, TF CardAudio Features: 5 voice change effects, Reverb, EchoPorts: USB, TF CardIncluded: 2 x Bluetooth Microphones, 1 x Speaker, 1 x Type-C USB Cable, 1 x ManualUses: KTV, outdoor parties, weddings, speechesWireless Distance: 10m