Sennheiser XSW 1-835 DUAL-A Wireless dual Hand Held vocal set. Includes (2) SKM 835-XSW (548-572 MHz)

• Dimensions - approx. 200 x 42 x 127 mm
• THD, total harmonic distortion - ≤ 0.9%
• Pick-up pattern - cardioid
• Signal-to-noise ratio - ≥ 103 dBA
• RF output power - 10 mW
• Switching bandwidth - up to 24 MHz
• Operating time - approx. 10 hrs
• Modulation - wideband FM
• Output voltage - 1/4“ (6.3 mm) jack socket (unbalanced): +6 dBu, XLR socket (balanced): +12 dBu
• Housing - rugged ABS housing
• Dynamic range - dynamic
• Frequency - 8 frequency banks, each with up to 10 factory-preset channels
• Frequency range - 

A: 548-572 MHz, GB: 606-630 MHz

B: 614-638 MHz

C: 766-790 MHz

D: 794-806 MHz

E: 821-832 MHz, 863-865 MHz

K: 925-937.5 MHz

• Sensitivity - < 3 μV at 52 dB(A)rms S/N
• Squelch - adjustable from 3 dBμV to 28 dBμV (combined with pilot tone)
• Synchronization - 2.4 GHz, Low Power OQPSK (only active during synchronization)
• Input sensitivity - 1.5 mV / Pa
• Adjustment Range Transmitter - 0 to -30 dB, adjustable in 10 dB steps
• Audio adjustment range - 45 dB, adjustable in 5-dB steps
• Line / Mic level - 20 dB, switchable
• Temperature Range - operation: 0°C to +40°C, storage: –20°C to +70°C
• Receiver Principle - double superheterodyne
• Diversity principle - Antenna switching diversity via internal antennas

Receivers

• Weight - approx. 340g
• Power supply - Receiver: 12 V DC nom. / 300 mA
• AF frequency response - Receiver: 50 to 16,000 Hz (–3 dB)

Microphone

• Weight - approx. 245g
• Power supply - Microphone: 2 AA size batteries, 1.5 V
• AF frequency response - SKM 825: 80-14,000 Hz / SKM 835: 80-16,000 Hz