FLYCHENGi UHF Handheld Wireless Microphone USB Powered Megaphone Loudspeaker Mic with Receiver Adapter for Karaoke Speech

Specifications: Input: 2.2 - 3V Working current: 90mA (Max.) Working frequency: 268.85Mhz (Fixed) Pattern: cardioid polar pickup pattern Sensitivity: -50 + / -3dB (0dB equal to 1V / Pa at 1KHz) THD: less than 0.7 percent S/N: more than 110dB Delay time: less than 5ms Frequency response: 50Hz?18kHz Power supply: 2 x AA battery (not included) Operating temperature: -10 - 50? Size: approx. 24.5x5cm Audio cable length: approx. 50cm USB Receiver Size: 8x2.5cm Color: Black Material: Plastic Type: 1xMicrophone,2xMicrophone(optional) Package includes: 1 x Microphone 1 x USB Receiver 1 x 3.5mm Audio Cable 1 x 3.5mm to 6.35mm adapter