U2 UHF Wireless Microphone System 2 Handheld Mics & 1 Receiver with LCD Display for Karaoke Home Entertainment Business Meeting Speech Classroom Teaching Features: Wireless microphone system with 2 handheld mics and 1 receiver, suitable for home karaoke, business meeting, public speech, classroom teaching, etc. UHF band frequency and 2 antennas design ensures stable and clear signal transmission, providing you with excellent sound quality. Adopts AF & RF automatic synchronizing technology for quick and easy connection of microphone and receiver. The receiver with LCD display for showing the frequency information and 2 control knobs for adjusting the volume of the microphones separately. With two XLR balanced and one 6.35mm audio mix unbalanced output interfaces for connecting speakers. Specifications: --System Modulation: Broadband FM Channel Spacing: 250KHz Frequency Stability: ±0.005% Dynamic Range: 100dB The Peak Frequency Deviation: ± 45KHz Frequency Responses: 80Hz-18KHz(± 3dB) S/ N Ratio: > 105 dB T.H.D. (Overall): <=0.5% --Receiver Power Supply: 12-18V 200mA Power Adapter: 100-240V US/ EU Plug(optional) Receiver Size: 21 * 15 * 4.5cm / 8.3 * 5.9 * 1.8in Receiver Weight: 422g / 14.9oz --Transmitter Transmitter Power: 30mW/ 3mW(HI/LO conversion) Spurious Suppression: -60dB Power Supply: 2 * 1.5V AA Battery (Not Included) Transmitter Size: 25 * 4cm/ 9.8 * 1.6in Transmitter Weight: 170g / 6oz(1pc without batteries)              Package Size: 36.5 * 29 * 6cm / 14.4 * 11.4 * 2.4in Package Weight: 1135g/ 2.5lbs Note: You will need an extra speaker or amplifier to connecting with the receiver to make the sound working. The batteries for microphones are not included. Package List: 1 * Receiver 2 * Microphones 1 * Audio Cable 1 * Power Adapter 1 * User Manual(English)