Item Type: Wireless MicrophoneMaterial: ABSMicro Sound Card Parameters:Bluetooth Version: 4.2+EDRTransmission Distance: 10mSignal to Noise Ratio: 65dBFrequency Response: 50Hz-20KHzCharging Voltage/Current: DC 5V/1.5AWorking Voltage: DC3.7VOutput Power: 800hWBattery Type: Lithium BatteryBattery Capacity: 1200mAh (Supporting Battery)U Section Receiving Technical Parameters:Signal to Noise Ratio: >90dBFalse Image Interference Ratio: > 80dBChannel Interference Ratio: > 80dBWorking Voltage: 3.7VMicrophone Parameters:Frequency Response: 50Hz-20KHzRF Range: 660-680MHzOperating Distance: 80m (Open Area)Battery Type: Lithium BatteryBattery Capacity: 1200mAh (Built-In)Package List1 x Receiver1 Pair x Microphone1 x Audio Cable1 x Data Cable1 x Manual1This is a pair of wireless microphones with antiinterference, antihowling and stable signal transmission. 2Fixedpoint onetoone technology solves the problem of string frequency, which is convenient for singing at any time. 3The signal is stable, the antiinterference ability is strong, and the receiving distance can be up to 80 meters. 4The microphone has an LED display and a digital highdefinition display, which can always display working status. 5The metal shockproof microphone head is beautiful and durable, and the builtin noiseproof cotton can resist wind noise and popping sound.