Check the listing for details. better music builder VM-92U G5 DUAL CHANNEL UHF WIRELESS MICROPHONE SYSTEM. Condition: New. Listed at 799.00 USD. Chúng tôi nói Tiếng Việt xin quí vị nhắn tin qua ebay message sẽ được giảm giá , chúng tôi sẽ trả lời ngay ( bằng tiếng Việt nhe)1 year warranty from manufacture FEATURES Six-axis gyroscope sensor integrated onto each microphone. Energy efficient microphones. High Tech Auto-Mute function activates when falling motion is detected. Sleep mode activates when microphone is left unattended. Equipped with the latest wireless technology and UHF dual-channel in a 2-in-1 Base. Clear LCD screen displays Radio Frequency, Volume, Channel, and Frequency. Wireless Auto Sync System technology makes setting up a breeze. Clear Voice technology delivers crystal clearer sound just like a wired microphone. 100 selectable channels for each microphone! Adjustable antennas for better signal receiving. AA batteries for easy usage. Receiver Left / Right squelch knobs. TECH SPECS A. 2-IN-1 BASE MODULE Channel: 100 Channels (total 200 Channels) Frequency Range: UHF 602~652 MHz Signal to Noise Ratio: > 90dB Total Harmonic Distortion: < 0.5% Band Width: < 250kHz Frequency Response: 30Hz~19kHz +/-3dB Sensitivity: ＞100dB Effective Use Range: ＞50M Receiver Shell: EIA standard 1/2U Receiving Sensitivity: 2.0μV Audio Output Level: Unbalanced Out: 0~+/-400mV; Balanced Out: 0~+/-200mV Power Supply: DC 14V~22V with 500mA~1000mA, AC 120V (For 220V, you may need to change to a 220V~240V DC adaptor) Consume Power: 5 Watts Receiver Dimensions (WxHxD): 8.2 x 1.7 x 6 in /20.9 x 4.2 x 15.2 cm Package Dimensions (WxHxD): 16.9 x 13.7 x 2.8 in /42.8 x 34.7 x 7.2 cm Shipping Weight: 5.6 Lbs / 2.5 Kg B. HANDHELD MICROPHONE Transmitter Power: 5mW or 10mW (Switchable) Osillation Mode: PLL Harmonic Radiation: ≤-50dBc Frequency Stability: ±0.005%，at 0～50℃ Battery Voltage: 2 x AA 1.5V Alkaline Battery Continuous Using: 8 Hours (GP) 2 x AA 1.5V Battery Power: DC 2.4~4.8V Microphone Dimensions (WxH): 10.3 x 2.2 (inches) / 26.2 x 5.7 (cm) UPC Code: 743062980933