Features 1.UHF technology is adopted, the remote wireless transmission is easy to operate, and no wire, can reach the maximum distance of 80m. 2.Wider frequency range, less interference, display of your voice easily and perfectly. 3.It adopts tight control of electronic circuits to capture rich, rich sounds from sources directly in front of the microphone. 4.Can be used with 3.5mm and 6.35mm female interface devices, with screen, display frequency/channel and other information. 5.Power USB receiver via USB charger, portable power supply, etc. 6.Suitable for recording studio, karaoke, radio, teacher, live show, meeting, hall, party, etc. specificationCondition: brand new Item Type: Microphone Material: ABS Color: as picture shown Receiver power voltage: 5v Transmitter operating current: < 80mA Operating current: 80mA (Maximum) Operating frequency: 265.85mhz (fixed) Sensitivity: -50 +/ -3db (0dB = 1 V/Pa at 1dB) THD: less than 0.7% Signal-to-noise ratio: over 110 db Delay time: less than 5 ms Frequency response: 40 Hz ~ 15 kHz Power supply: 2 x AA battery (not included) Operating temperature: -10-50 PackageList1 x Microphone1 x USB Receiver1 x 3.5mm Audio Cable1 x 3.5mm to 6.35mm Adapter1 x Manual