Overview XS Wireless 1 DUAL is a 2-channel wireless system for singers and presenters. Designed with ease of use in mind, these analog UHF systems feature a sleek dual-channel receiver with built-in antennas and the streamlined interface from Sennheiser's popular XS Wireless 1 series. FEATURES Excellent live sound featuring Sennheiser's renowned evolution microphone capsules Antenna-switching 2-channel diversity reception Integrated antennas Automatic frequency management and synchronization via remote channel for easy setup Selectable UHF frequencies within a large bandwidth Up to 10 compatible channels SYSTEM Connector: XLR-3 Dimensions: Ø 48 x L 180 mm Frequency response: 55 - 16,000 Hz THD, total harmonic distortion: ≤ 0.9% Transducer principle: dynamic Pick-up pattern: cardioid Nominal impedance: 300 Ω (at 1 kHz) Min. terminating impedance: 1 kΩ Storage: temperature –20°C to +70°C Operating temperature: 0°C to +40°C Signal-to-noise ratio: ≥ 103 dBA Switching bandwidth: Up to 24 MHz Modulation: Wideband FM Frequency: 80 factory presets (8 banks of 10 channels each) Sensitivity: 1.8 mV/Pa (free field, no load at 1 kHz) Synchronization: Transmitter: 2.4 GHz, low power OQPSK (only active during synchronization) Temperature Range: 0 °C ... +40 °C (+32 °F ... +104 °F) EM-XSW 1 DUAL Power supply: 12 V DC nom. / 300 mA Output voltage: (at peak deviation, 1 kHz AF) 1/4“ (6.3 mm) socket (unbalanced): +6 dBu Housing: Rugged ABS housing Sensitivity: < 3 μV at 52 dB(A) rms S/N (at peak deviation) Squelch: Adjustable from 3 dBμV to 28 dBμV AF frequency response: 50 to 16,000 Hz (–3 dB) Audio adjustment range: 45 dB, adjustable in 5 dB steps Line / Mic level: 20 dB, switchable Receiver Principle: Double superheterodyne Diversity principle: Antenna switching diversity via internal antennas SKM 825-XSW Microphone: Dynamic Pick-up pattern: Cardioid RF output power: 10 mW Operating time: Approx. 10 hrs Power supply: 2 AA size batteries, 1.5 V Housing: Rugged ABS housing Sensitivity: 0 to -30 dB, adjustable in 10 dB steps Input sensitivity: 1.5 mV / Pa AF frequency response: 80-16,000 Hz